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SWISH-CONFIG(1) SWISH-E Documentation SWISH-CONFIG(1)

NAME
SWISH-CONFIG - Configuration File Directives

OVERVIEW
This document lists the available configuration directives available in
Swish-e.

CONFIGURATION FILE
What files Swish-e indexes and how they are indexed, and where the
index is written can be controlled by a configuration file.

The configuration file is a text file composed of comments, blank
lines, and configuration directives. The order of the directives is
not important. Some directives may be used more than once in the
configuration file, while others can only be used once (e.g. additional
directives will overwrite preceding directives). Case of the directive
is not important -- you may use upper, lower, or mixed case.

Comments are any line that begin with a "#".

# This is a comment

As of 2.4.3 lines may be continued by placing a backslas as the last
character on the line:

IgnoreWords \
am \
the \
foo

Directives may take more than one parameter. Enclose single parameters
that include whitespace in quotes (single or double). Inside of quotes
the backslash escapes the next character.

ReplaceRules append "foo bar" <- define "foo bar" as a single parameter

If you need to include a quote character in the value either use a
backslash to escape it, or enclose it in quotes of the other type.

Backslashes also have special meaning in regular expressions.

FileFilterMatch pdftotext "'%p' -" /\.pdf$/

This says that the dot is a real dot (instead of matching any
character). If you place the regular expression in quotes then you
must use double-backslashes.

FileFilterMatch pdftotext "'%p' -" "/\\.pdf$/"

Swish-e will convert the double backslash into a single backslash
before passing the parameter to the regular expression compiler.

Commented example configuration files are included in the conf
directory of the Swish-e distribution.

Some command line arguments can override directives specified in the
configuration file. Please see also the SWISH-RUN for instructions on
running Swish-e, and the SWISH-SEARCH page for information and examples
on how to search your index.

The configuration file is specified to Swish-e by the "-c" switch. For
example,

swish-e -c myconfig.conf

You may also split your directives up into different configuration
files. This allows you to have a master configuration file used for
many different indexes, and smaller configuration files for each
separate index. You can specify the different configuration files when
running from the command line with the "-c" switch (see SWISH-RUN), or
you may include other Configuration file with the IncludeConfigFile
directive below.

Typically, in a configuration file the directives are grouped together
in some logical order -- that is, directives that control the source of
the documents would be grouped together first, and directives that
control how each document is filtered or its words index in another
group of directives. (The directives listed below are grouped in this
order).

The configuration file directives are listed below in these groups:

o "Administrative Headers Directives" -- You may add administrative
information to the header of the index file.

o "Document Source Directives" -- Directives for selecting the source
documents and the location of the index file.

o "Document Contents Directives" -- Directives that control how a
document content is indexed.

o "Directives for the File Access method only" -- These directives
are only applicable to the File Access indexing method.

o "Directives for the HTTP Access Method Only" -- Likewise, these
only apply to the HTTP Access method.

o "Directives for the prog Access Method Only" -- These only apply to
the prog Access method.

o "Document Filter Directives" -- This is a special section that
describes using document filters with Swish-e.

Alphabetical Listing of Directives

o AbsoluteLinks [yes|NO]

o BeginCharacters *string of characters*

o BumpPositionCounterCharacters *string*

o Buzzwords [*list of buzzwords*|File: path]

o CompressPositions [yes|NO]

o ConvertHTMLEntities [YES|no]

o DefaultContents [TXT|HTML|XML|TXT2|HTML2|XML2|TXT*|HTML*|XML*]

o Delay *seconds*

o DontBumpPositionOnEndTags *list of names*

o DontBumpPositionOnStartTags *list of names*

o EnableAltSearchSyntax [yes|NO]

o EndCharacters *string of characters*

o EquivalentServer *server alias*

o ExtractPath *metaname* [replace|remove|prepend|append|regex]

o FileFilter *suffix* *program* [options]

o FileFilterMatch *program* *options* *regex* [*regex* ...]

o FileInfoCompression [yes|NO]

o FileMatch [contains|is|regex] *regular expression*

o FileRules [contains|is|regex] *regular expression*

o FuzzyIndexingMode [NONE|Stemming|Soundex|Metaphone|DoubleMetaphone]

o FollowSymLinks [yes|NO]

o HTMLLinksMetaName *metaname*

o IgnoreFirstChar *string of characters*

o IgnoreLastChar *string of characters*

o IgnoreLimit *integer integer*

o IgnoreMetaTags *list of names*

o IgnoreNumberChars *list of characters*

o IgnoreTotalWordCountWhenRanking [YES|no]

o IgnoreWords [*list of stop words*|File: path]

o ImageLinksMetaName *metaname*

o IncludeConfigFile

o IndexAdmin *text*

o IndexAltTagMetaName *tagname*|as-text

o IndexComments [yes|NO]

o IndexContents [TXT|HTML|XML|TXT2|HTML2|XML2|TXT*|HTML*|XML*] *file
extensions*

o IndexDescription *text*

o IndexDir [URL|directories or files]

o IndexFile *path*

o IndexName *text*

o IndexOnly *list of file suffixes*

o IndexPointer *text*

o IndexReport [0|1|2|3]

o MaxDepth *integer*

o MaxWordLimit *integer*

o MetaNameAlias *meta name* *list of aliases*

o MetaNames *list of names*

o MinWordLimit *integer*

o NoContents *list of file suffixes*

o obeyRobotsNoIndex [yes|NO]

o ParserWarnLevel [0|1|2|3]

o PreSortedIndex *list of property names*

o PropCompressionLevel [0-9]

o PropertyNameAlias *property name* *list of aliases*

o PropertyNames *list of meta names*

o PropertyNamesCompareCase *list of meta names*

o PropertyNamesIgnoreCase *list of meta names*

o PropertyNamesNoStripChars *list of meta names*

o PropertyNamesDate *list of meta names*

o PropertyNamesNumeric *list of meta names*

o PropertyNamesMaxLength integer *list of meta names*

o PropertyNamesSortKeyLength integer *list of meta names*

o ReplaceRules [replace|remove|prepend|append|regex]

o ResultExtFormatName name -x format string

o SpiderDirectory *path*

o StoreDescription [XML <tag>|HTML <meta>|TXT size]

o "SwishProgParameters *list of parameters*

o SwishSearchDefaultRule [<AND-WORD>|<or-word>]

o TmpDir *path*

o TranslateCharacters [*string1 string2*|:ascii7:]

o TruncateDocSize *number of characters*

o UndefinedMetaTags [error|ignore|INDEX|auto]

o UndefinedXMLAttributes [DISABLE|error|ignore|index|auto]

o UseStemming [yes|NO]

o UseSoundex [yes|NO]

o UseWords [*list of words*|File: path]

o WordCharacters *string of characters*

o XMLClassAttributes *list of XML attribute names*

Directives that Control Swish

These configuration directives control the general behavior of Swish-e.

IncludeConfigFile *path to config file*
This directive can be used to include configuration directives
located in another file.

IncludeConfigFile /usr/local/swish/conf/site_config.config

IndexReport [0|1|2|3]
This is how detailed you want reporting while indexing. You can
specify numbers 0 to 3. 0 is totally silent, 3 is the most
verbose. The default is 1.

This may be overridden from the command line via the "-v" switch
(see SWISH-RUN).

ParserWarnLevel [0|1|2|3]
Sets the error level when using the libxml2 parser for XML and
HTML. libxml2 will point out structural errors in your documents.

0 = no report
1 = fatal errors
2 = errors
3 = warnings

Currently (as of 2.4.4 - early 2005) libxml2 only reports errors at
level 2. The default as of 2.4.4 is "2" which should report any
errors that might indicate a problem parsing a document.

The exception to this is UTF-8 to Latin-1 conversion errors are
reported at level 3 (changed from 1 in 2.4.4). Although these
errors indicate a problem indexing text, they are only reported at
level 3 because they can be very common.

It is recommended that you index at ParserWarnLevel 3 when first
starting out to see what errors and warnings are reported. Then
reduce the level when you understand what documents are causing
parsing problems and why.

IndexFile *path*
Index file specifies the location of the generated index file. If
not specified, Swish-e will create the file index.swish-e in the
current directory.

IndexFile /usr/local/swish/site.index

obeyRobotsNoIndex [yes|NO]
When enabled, Swish-e will not index any HTML file that contains:

The default is to ignore these meta tags and index the document.
This tag is described at
http://www.robotstxt.org/wc/exclusion.html.

Note: This feature is only available with the libxml2 HTML parser.

Also, if you are using the libxml2 parser (HTML2 and XML2) then you
can use the following comments in your documents to prevent
indexing:

and/or these may be used also:

For example, these are very helpful to prevent indexing of common
headers, footers, and menus.

NOTE: This following items are currently not available. These items
require Swish-e to parse the configuration file while searching.

EnableAltSearchSyntax [yes|NO]
NOTE: This following item is currently not available.

Enable alternate search syntax. Allows the usage of a basic
"Altavista(c)", "Lycos(c)", etc. like search syntax. This means a
search query can contain "+" and "-" as syntax parameter.

Example:

swish-e -w "+word1 +word2 -word3 word4 word5"
"+" = following word has to be in all found documents
"-" = following word may not be in any document found
" " = following word will be searched in documents

SwishSearhOperators <and-word> <or-word> <not-word>
NOTE: This following item is currently not available.

Using this config directive you can change the boolean search
operators of Swish-e, e.g. to adapt these to your language. The
default is: AND OR NOT

Example (german):

SwishSearchOperators UND ODER NICHT

SwishSearchDefaultRule [<AND-WORD>|<or-word>]
NOTE: This following item is currently not available.

"SwishSearchDefaultRule" defines the default Boolean operator to
use if none is specified between words or phrases. The default is
"AND".

The word you specify must match one of the available
"SwishSearchOperators".

Example:

SwishSearchOperators UND ODER NICHT
# Make it act like a web search engine
SwishSearchDefaultRule ODER

ResultExtFormatName name -x format string
NOTE: This following item is currently not available.

The output of Swish-e can be defined by specifying a format string
with the "-x" command line argument. Using "ResultExtFormatName"
you can assign a predefined format string to a name.

Examples:

ResultExtFormatName moreinfo "%c|%r|%t|%p|<author>|<publishyear>\n"

Then when searching you can specify the format string's name

swish-e ... -x moreinfo ...

See the "-x" switch in SWISH-RUN for more information about output
formats.

Administrative Headers Directives

Swish-e stores configuration information in the header of the index
file. This information can be retrieved while searching or by
functions in the Swish-e C library. There are a number of fields
available for your own use. None of these fields are required:

IndexName *text*
IndexDescription *text*
IndexPointer *text*
IndexAdmin *text*
These variables specify information that goes into index files to
help users and administrators. IndexName should be the name of
your index, like a book title. IndexDescription is a short
description of the index or a URL pointing to a more full
description. IndexPointer should be a pointer to the original
information, most likely a URL. IndexAdmin should be the name of
the index maintainer and can include name and email information.
These values should not be more than 70 or so characters and should
be contained in quotes. Note that the automatically generated date
in index files is in D/M/Y and 24-hour format.

Examples:

IndexName "Linux Documentation"
IndexDescription "This is an index of /usr/doc on our Linux machine."
IndexPointer http://localhost/swish/linux/index.html
IndexAdmin webmaster

Document Source Directives

These directives control what documents are indexed and how they are
accessed. See also Directives for the File Access method only and
Directives for the HTTP Access Method Only for directives that are
specific to those access methods.

IndexDir [directories or files|URL|external program]
IndexDir defines the source of the documents for Swish-e. Swish-e
currently supports three file access methods: File system, HTTP
(also called spidering), and prog for reading files from an
external program.

The "-S" command line argument is used to select the file access
method.

swish-e -c swish.config -S fs - file system
swish-e -c swish.config -S http - internal http spider
swish-e -c swish.config -S prog - external program of any type

For the fs method of access IndexDir is a space-separated list of
files and directories to index. Use a forward slash as the path
separator in MS Windows.

For the http method the IndexDir setting is a list of space-
separated URLs.

For the prog method the IndexDir setting is a list of space-
separated programs to run (which generate documents for swish to
index).

You may specify more than one IndexDir directive.

Any sub-directories of any listed directory will also be indexed.

Note: While processing directories, Swish-e will ignore any files
or directories that begin with a dot ("."). You may index files or
directories that begin with a dot by specifying their name with
"IndexDir" or "-i".

Examples:

# Index this directory an any subdirectories
IndexDir /usr/local/home/http

# Index the docs directory in current directory
IndexDir ./docs

# Index these files in the current directory
IndexDir ./index.html ./page1.html ./page2.html
# and index this directory, too
IndexDir ../public_html

For the HTTP method of access specify the URL's from which you want
the spidering to begin.

Example:

IndexDir http://www.my-site.com/index.html
IndexDir http://localhost/index.html

Obviously, using the HTTP method to index is much slower than
indexing local files. Be well aware that some sites do not
appreciate spidering and may block your IP address. You may wish
to contact the remote site before spidering their web site. More
information about spidering can be found in Directives for the HTTP
Access Method Only below.

For the prog method of access IndexDir specifies the path to the
program(s) to execute. The external program must correctly format
the documents being passed back to Swish-e. Examples of external
programs are provided in the prog-bin directory.

IndexDir ./myprogram.pl

See prog for details.

Note: Not all directives work with all methods.

NoContents *list of file suffixes*
Files with these suffixes will not have their contents indexed, but
will have their path name (file name) indexed instead.

If the file's type is HTML or HTML2 (as set by "IndexContents" or
"DefaultContents") then the file will be parsed for a HTML title
and that title will be indexed. Note that you must set the file's
type with "IndexContents" or "DefaultContents": ".html" and ".htm"
are NOT type HTML by default. For example:

IndexContents HTML* .htm .html

If a title is found, it will still be checked for "FileRules
title", and the file will be skipped if a match is found. See
"FileRules".

If the file's type is not HTML, or it is HTML and no title is
found, then the file's path will be indexed.

For example, this will allow searching by image file name.

NoContents .gif .xbm .au .mov .mpg .pdf .ps

Note: Using this directive will not cause files with those suffixes
to be indexed. That is, if you use "IndexOnly" to limit the types
of files that are indexed, then you must specify in "IndexOnly" the
same suffixes listed in "NoContents".

This does not work:

# Wrong!
IndexOnly .htm .html
NoContents .gif .xbm .au .mov .mpg .pdf .ps

A "-S prog" program may set the "No-Contents:" header to enable
this feature for a specific document (although it would be smarter
for the "-S prog" program to simply only send the pathname or title
to be indexed.

ReplaceRules [replace|remove|prepend|append|regex]
ReplaceRules allows you to make changes to file pathnames before
they're indexed. These changed file names or URLs will be returned
in search results.

For example, you may index your files locally (with the File system
indexing method), yet return a URL in search results. This
directive can be used to map the file names to their respective
URLs on your web server.

There are five operations you can specify: replace, append, remove,
prepend, and regex They will parse the pathname in the order you've
typed these commands.

This directive uses C library regex.h regular expressions.

replace "the string you want replaced" "what to change it to"
remove "a string to remove"
prepend "a string to add before the result"
append "a string to add after the result"
regex "/search string/replace string/options"

Remember, quotes are needed if an expression contains white space,
and backslashes have special meaning.

Regex is an Extended Regular Expression. The first character found
is the delimiter (but it's not smart enough to use matched chars
such as [], (), and {}).

The replace string may use substitution variables:

$0 the entire matched (sub)string
$1-$9 returns patterns captured in "(" ")" pairs
$` the string before the matched pattern
$' the string after the matched pattern

The options change the behavior of expression:

i ignore the case when matching
g repeat the substitution for the entire pattern

Examples:

ReplaceRules replace testdir/ anotherdir/
ReplaceRules replace [a-z_0-9]*_m.*\.html index.html

ReplaceRules remove testdir/

ReplaceRules prepend http://localhost/
ReplaceRules append .html

ReplaceRules regex !^/web/(.+)/!http://$1.domain.com/!
replaces a file path:
/web/search/foo/index.html
with
http://search.domain.com/foo/index.html

ReplaceRules regex #^#http://localhost/www#
ReplaceRules prepend http://localhost/www (same thing)

# Remove all extensions from C source files
ReplaceRules remove .c # ERROR! That "." is *any char*
ReplaceRules remove \.c # much better...

ReplaceRules remove "\\.c" # if in quotes you need double-backslash!
ReplaceRules remove "\.c" # ERROR! "\." -> "." and is *any char*

IndexContents [TXT|HTML|XML|TXT2|HTML2|XML2|TXT*|HTML*|XML*] *file
extensions*
The "IndexContents" directive assigns one of Swish-e's document
parsers to a document, based on the its extension. Swish-e
currently knows how to parse TXT, HTML, and XML documents.

The XML2, HTML2, and TXT2 parsers are currently only available when
Swish-e is configured to use libxml2.

You may use XML*, HTML*, and TXT* to select the parser
automatically. If libxml2 is installed then it will be used to
parse the content. Otherwise, Swish-e's internal parsers will be
used.

Documents that are not assigned a parser with "IndexContents" will,
by default, use the HTML2 parser if libxml2 is installed, otherwise
will use Swish-e's internal HTML parser. The "DefaultContents"
directive may be used to assign a parser to documents that do not
match a file extension defined with the "IndexContents" directive.

Example:

IndexContents HTML* .htm .html .shtml
IndexContents TXT* .txt .log .text
IndexContents XML* .xml

HTML* is the default type for all files, unless otherwise specified
(and this default can be changed by the DefaultContents directive.
Swish-e parses titles from HTML files, if available, and keeps
track of the context of the text for context searching (see "-t" in
SWISH-RUN).

If using filters (with the "FileFilter" directive) to convert
documents you should include those extensions, too. For example,
if using a filter to convert .pdf to .html, you need to tell Swish-
e that .pdf should be indexed by the internal HTML parser:

FileFilter .pdf pdf2html
IndexContent HTML .pdf

See also "ExtractPath".

MetaNameAlias *meta name* *list of aliases*
MetaNameAlias assigns aliases for a meta name. For example, if
your documents contain meta tags "description", "summary", and
"overview" that all give a summary of your documents you could do
this:

MetaNames summary
MetaNameAlias summary description overview

Then all three tags will get indexed as meta tag "summary". You
can then search all the fields as:

-w summary=foo

The Alias work at search time, too. So these will also limit the
search to the "summary" meta name.

-w description=foo
-w overview=foo

MetaNamesRank integer *list of meta names*
You can assign a bias to metanames that will affect how ranking is
calculated. The range of values is from -10 to +10, with zero
being no bias.

MetaNamesRank 4 subject
MetaNamesRank 3 swishdefault
MetaNamesRank 2 author publisher
MetaNamesRank -5 wrongwords

This feature is still considered experimental. If you use it,
please send feedback to the discussion list.

HTMLLinksMetaName *metaname*
Allows indexing of HTML links. Normally, HTML links (href tags)
are not indexed by Swish-e. This directive defines a metaname, and
links will be indexed under this meta name.

Example:

HTMLLinksMetaName links

Now, to limit searches to files with a link to "home.html" do this:

-w links='"home.html"'

The double quotes force a phrase search.

To make Swish-e index links as normal text, you may use:

HTMLLinksMetaName swishdefault

This feature is only available with the libxml2 HTML parser.

ImageLinksMetaName *metaname*
Allows indexing of image links under a metaname. Normally, image
URLs are not indexed.

Example:

ImagesLinksMetaName images

Now, if you would like to find pages that include a nice image of a
beach:

-w images='beach'

To make Swish-e index links as normal text, you may use:

ImageLinksMetaName swishdefault

This feature is only available with the libxml2 HTML parser.

IndexAltTagMetaName *tagname*|as-text
Allows indexing of images <IMG> ALT tag text. Specify either a tag
name which will be used as a metaname, or the special text
"as-text" which says to index the ALT text as if it were plain text
at the current location.

For example, by specifying a tag name:

IndexAltTagMetaName bar

would make this markup:

appear like

Then the normal rules ("MetaNames" and "PropertyNames") apply to
how that text is indexed.

If you use the special tag "as-text" then

simply becomes

This feature is only available when using the libxml2 parser (HTML2
and XML2).

AbsoluteLinks [yes|NO]
If this is set true then Swish-e will attempt to convert relative
URIs extracted from HTML documents for use with "HTMLLinksMetaName"
and "ImageLinksMetaName" into absolute URIs. Swish-e will use any
<BASE> tag found in the document, otherwise it will use the file's
pathname. The pathname used will be the pathname *after*
"ReplaceRules" has been applied to the document's pathname.

For example, say you wish to index image links under the metaname
"images".

ImageLinksMetaName images

If an image is located in
http://localhost/vacations/france/index.html and "AbsoluteLinks" is
set to no, then a image within that document:

will only index "beach.jpeg".

But, if you want more detail when searching, you can enable
"AbsoluteLinks" and Swish-e will index
"http://localhost/vacations/france/beach.jpeg". You can then look
for images of beaches, but only in France:

-w images=(beach and france)

This also means you can search for any images within France:

-w images=(france)

This feature is only available with the libxml2 HTML parser.

UndefinedMetaTags [error|ignore|INDEX|auto]
This directive defines the behavior of Swish-e during indexing when
a meta name is found but is not listed in MetaNames. There are
four choices:

error
If a meta name is found that is not listed in MetaNames then
indexing will be halted and an error reported.

ignore
The contents of the meta tag are ignored and not indexed unless a
metaname has been defined with the "MetaNames" directive.

index
The contents of the meta tag are indexed, but placed in the main
index unless there's an enclosing metatag already in force. This
is the default.

auto
This method create meta tags automatically for HTML meta names
and XML elements. Using this is the same as specifying all the
meta names explicitly in a MetaNames directive.

UndefinedXMLAttributes [DISABLE|error|ignore|index|auto]
This is similar to "UndefinedMetaTags", but only applies to XML
documents (parsed with libxml2). This allows indexing of attribute
content, and provides a way to index the content under a metaname.
For example, "UndefinedXMLAttributes" can make

look like the following to swish:

What happens to the text "23" will depend on the setting of
"UndefinedXMLAttributes":

disable
XML attributes are not parsed and not indexed. This is the
default.

error
If the concatenated meta name (e.g. person.age) is not listed in
MetaNames then indexing will be halted and an error reported.

ignore
The contents of the meta tag are ignored and not indexed unless a
metaname has been defined with the "MetaNames" directive.

index
The contents of the meta tag are indexed, but placed in the main
index unless there's an enclosing metatag already in force.

auto
This method will create meta tags from the combined element and
attributes (and XML Class name) This options should be used with
caution as it can generate a lot of metaname entries.

See also the example below "XMLClassAttribues".

XMLClassAttributes *list of XML attribute names*
Combines an XML class name with the element name to make up a
metaname. For example:

XMLClassAttributes class

Will appear to Swish-e as:

How the data is indexed depends on "MetaNames" and
"UndefinedMetaTags".

Here's an example using the following configuration which combines
the two directives "XMLClassAttributes" and
"UndefinedXMLAttributes".

XMLClassAttributes class
UndefinedMetaTags auto
UndefinedXMLAttributes auto
IndexContents XML2 .xml

The source XML file looks like:

Swish-e parses as:

./swish-e -c 2 -i 1.xml -T parsed_tags parsed_text -v 0
Indexing Data Source: "File-System"

<xml> (MetaName)

<person> (MetaName)
<person.student> (MetaName)
<person.student.phone> (MetaName)
555-1212
</person.student.phone>
<person.student.age> (MetaName)
102
</person.student.age>
John
</person>

<person> (MetaName)
<person.greeting> (MetaName)
howdy
</person.greeting>
Bill
</person>

</xml>
Indexing done!

One thing to note is that the first <person> block finds a class
name "student" so all metanames that are created from attributes
use the combined name "person.student". The second <person> block
doesn't contain a "class" so, the attribute name is combined
directly with the element name (e.g. "person.greeting").

ExtractPath *metaname* [replace|remove|prepend|append|regex]
This directive can be used to index extracted parts of a document's
path. A common use would be to limit searches to specific areas of
your file tree.

The extracted string will be indexed under the specified meta name.

See "ReplaceRules" for a description of the various pattern
replacement methods, but you will use the regex method.

For example, say your file system (or web tree) was organized into
departments:

/web/sales/foo...
/web/parts/foo...
/web/accounting/foo...

And you wanted a way to limit searches to just documents under
"sales".

ExtractPath department regex !^/web/([^/]+)/.*$!$1!

Which says, extract out the department name (as substring $1) and
index it as meta name "department". Then to limit a search to the
sales department:

swish-e -w foo AND department=sales

Note that the "regex" method uses a substitution pattern, so to
index only a sub-string match the entire document path in the
regular expression, as shown above. Otherwise any part that is not
matched will end up in the substitution pattern.

See the "ExtractPathDefault" option for a way to set a value if not
patterns match.

Although unlikely, you may use more than one "ExtractPath"
directive. More than one directive of the same meta name will
operate successively (in order listed in the configuration file) on
the path. This allows you to use regular expressions on the
results of the previous pattern substitution (as if piping the
output from one expression to the patter of the next).

ExtractPath foo regex !^(...).+$!$1!
ExtractPath foo regex !^.+(.)$!$1!

So, the third letter is indexed as meta name "foo" if both patterns
match.

ExtractPath foo regex !^X(...).+$!$1!
ExtractPath foo regex !^.+(.)$!$1!

Now (not the "X"), if the first pattern doesn't match, the last
character of the path name is indexed. You must be clear on this
behavior if you are using more than one "ExtractPath" directive
with the same metaname.

The document path operated on is the real path swish used to access
the document. That is, the "ReplaceRules" directive has no effect
on the path used with "ExtractPath".

The full path is used for each meta name if more than one
"ExtractPath" directive is used. That is, changes to the path used
in "ExtractPath foo" do not affect the path used by "ExtractPath
bar".

ExtractPathDefault *metaname* default_value
This can be used with "ExtractPath" to set a default string to
index under the given metaname if none of the "ExtractPath"
patterns match.

For example, say your want to index each document with a metaname
"department" based on the following path examples:

/web/sales/foo...
/web/parts/foo...
/web/accounting/foo...

But you are also indexing documents that do not follow that pattern
and you want to search those separately, too.

ExtractPath department regex !^/web/([^/]+)/.*$!$1!
ExtractPathDefault department other

Now, you may search like this:

-w foo department=(sales) - limit searches to the sales documents
-w foo department=(parts) - limit searches to the parts documents
-w foo department=(accounting) - limit searches to the accounting documents
-w foo department=(other) - everything but sales, parts, and accounting.

This basically is a shortcut for:

-w foo not department=(sales or parts or accounting)

but you don't need to keep track of what was extracted.

PropertyNames *list of meta names*
PropertyNamesCompareCase *list of meta names*
PropertyNamesIgnoreCase *list of meta names*
Swish-e allows you to specify certain META tags that can be used as
document properties. The contents of any META tag that has been
identified as a document property can be returned as part of the
search results along with the rank, file name, title, and document
size (see the "-p" and "-x" switches in SWISH-RUN).

Properties are useful for returning additional data from documents
in search results -- this saves the effort of reading and parsing
the source files while reading Swish-e search results, and is
especially useful when the source documents are no longer available
or slow to access (e.g. over http).

Another feature of properties is that Swish-e can use the
PropertyNames for sorting the search results (see the "-s" switch).

PropertyNames author subjects

Two variations are available. "PropertyNamesCompareCase" and
"PropertyNamesIgnoreCase". These tell Swish-e to either ignore or
compare case when sorting results. The default for "PropertyNames"
is to ignore the case.

PropertyNamesIgnoreCase subject
PropertyNamesCompareCase keyword

The defaults for "internal" properties are:

swishtitle -- ignore the case
swishdocpath -- compare case
swishdescription -- compare case

These can be overridden with "PropertyNamesCompareCase" and
"PropertyNamesIgnoreCase".

PropertyNamesCompareCase swishtitle

Use of PropertyNames will increase the size of your index files,
sometimes significantly. Properties will be compressed if Swish-e
is compiled with zlib as described in the INSTALL manual page.

If Swish-e finds more than one property of the same name in a
document the property's contents will be concatinated for strings,
and a warning issues for numeric (or date) properties.

PropertyNamesNoStripChars
PropertyNamesNoStripChars specifies that the listed properties
should not have strings of low ASCII characters replaced with a
space character. Properties will be stored as found in the
document.

When printing properties with the swish-e binary newlines are
replaced with a space character. Use the swish-e library (or
SWISH::API perl module) to fetch properties without newlines
replaced.

PropertyNamesNumeric
This directive is similar to "PropertyNames", but it flags the
property as being a string of digits (integer value) that will be
stored as binary data instead of a string. This allows sorting
with "-s" and limiting with "-L" to sort and limit the property
correctly.

Swish-e uses strtoul(3) to convert the string into an unsigned long
integer. Therefore, only positive integers can be stored.

Future versions of Swish-e may be able to store different property
types (such as negative integers and real numbers). This directive
may change in future releases of Swish.

PropertyNamesDate
This directive is exactly like "PropertyNamesNumeric", but it also
flags the number as a machine timestamp (seconds since Epoch), and
will print a formatted date when returning this property. See "-x"
in SWISH-RUN.

Swish-e will not parse dates when indexing; you must use a
timestamp.

PropertyNameAlias *property name* *list of aliases*
This allows aliases for a property name. For example, if you are
indexing HTML files, plus XML files that are written in English,
German, and Spanish and thus use the tags "title", "titel", and
"titulo" you can use:

PropertyNameAlias swishtitle title titel titulo titulo

Note that "swishtitle" is the built-in property used to store the
title of a document, and therefore you do not need to specify it as
a PropertyName before use.

PropertyNamesMaxLength integer *list of meta names*
This option will set the max length of the text stored in a
property. You must specify a number between 0 and the max integer
size on your platform, and a list of properties. The properties
specified must not be aliases.

If any of the property names do not exist they will be created
(e.g. you do not need to define the property with PropertyNames
first).

In general, this feature will only be useful when parsing HTML or
XML with the libxml2 parser.

For example:

PropertyNamesMaxLength 1000 swishdescription
PropertyNameAlias swishdescription body

Is somewhat like

StoreDescription HTML <body> 1000
StoreDescription XML <body> 1000
StoreDescription HTML2 <body> 1000
StoreDescription XML2 <body> 1000

but StoreDescription allows setting the tag for each parser type.

PropertyNamesMaxLength 1000 headings
PropertyNameAlias headings h1 h2 h3 h4

collects all the heading text into a single property called
"headings", not to exceed 1000 characters.

PropertyNamesSortKeyLength integer *list of meta names*
Sets the length of the string used when sorting. The default is
100 characters. The -T metanames debugging option will list the
current values for an index.

This setting is used when sorting during indexing, and perhaps when
sorting while searching. It also effects the order when limiting
to a range of values with the -L option.

PreSortedIndex *list of property names*
By default Swish-e generates presorted tables while indexing for
each property name. This allows faster sorting when generating
results. On large document collections this presorting may add to
the indexing time, and also adds to the total size of the index.
This directive can be used to customize exactly which properties
will be presorted.

If "PreSortedIndex" it is not present in the config file (default
action), all the properties will be presorted at indexing time. If
it is present without any parameter, no properties will be
presorted. Otherwise, only the property names specified will be
presorted.

For example, if you only wish to sort results by a property called
"title":

PropertyNames title age time
PreSortedIndex title

StoreDescription [XML <tag> size|HTML <meta> size|TXT size]
StoreDescription allows you to store a document description in the
index file. This description can be returned in your search
results when the "-x" switch is used to include the
swishdescription for extended results, or by using "-p
swishdescription".

The document type (XML, HTML and TXT) must match the document type
currently being indexed as set by "IndexContents" or
"DefaultContents". See those directives for possible values. A
common problem is using "StoreDescription" yet not setting the
document's type with "IndexContents" or "DefaultContents". Another
problem is different types:

IndexContents HTML2 .html
StoreDescription HTML <body>

Then .html documents are assigned a type of HTML2 (and parsed by
the libxml2 parser), but the description will not be stored since
it is type HTML instead of HTML2.

For text documents you specify the type TXT (or TXT2 or TXT*) and
the number of characters to capture.

StoreDescription TXT 20

The above stores only the first twenty characters from the text
file in the Swish-e index file.

For HTML, and XML file types, specify the tag to use for the
description, and optionally the number of characters to capture.
If not specified will capture the entire contents of the tag.

StoreDescription HTML <body> 20000
StoreDescription XML <desc> 40

Again, note that documents must be assigned a document type with
"IndexContents" or "DefaultContents" to use this feature.

Swish-e will compress the descriptions (or any other large
property) if compiled to use zlib (see INSTALL). This is
recommended when using StoreDescription and a large number of
documents. Compression of 30% to 50% is not uncommon with HTML
files.

PropCompressionLevel [0-9]
This directive sets the compression level used when storing
properties to disk. A setting of zero is no compression, and a
setting of nine is the most compression.

The default depends on the default setting compiled with zlib, but
is typically six.

This option is useful when using "StoreDescription" to store a
large amount text in properties (or if using "PropertyNames" with
large property sizes).

Properties must be over a value defined in config.h (100 is the
default) before compression will be attempted. Swish-e will never
store the results of the compression if the compressed data is
larger than the original data.

This option is only available when Swish-e is compiled with zlib
support.

TruncateDocSize *number of characters*
TruncateDocSize limits the size of a document while indexing
documents and/or using filters. This config directive truncates
the numbers of read bytes of a document to the specified size.
This means: if a document is larger, read only the specified
numbers of bytes of the document.

Example:

TruncateDocSize 10000000

The default is zero, which means read all data.

Warning: If you use TruncateDocSize, use it with care!
TruncateDocSize is a safety belt only, to limit e.g. filteroutput,
when accessing databases, or to limit "runnaway" filters.
Truncating doc input may destroy document structures for Swish-e
(e.g. swish may miss closing tags for XML or HTML documents).

TruncateDocSize does not currently work with the "prog" input
source method.

FuzzyIndexingMode NONE|Stemming|Soundex|Metaphone|DoubleMetaphone
Selects the type of index to create. Only one type of index may be
created.

It's a good idea to create both a normal index and a fuzzy index
and allow your search interface select which index to use. Many
people find the fuzzy searches to be too fuzzy.

The available fuzzy indexing options can be displayed by running

swish-e -T LIST_FUZZY_MODES

Available options include:

None
Words are stored in the index without any conversion. This is
the default.

Stemming_*
This options uses one of the installed Snowball stemmers
(http://snowball.tartarus.org/).

The installed stemmers can be viewed by running

swish-e -T LIST_FUZZY_MODES

For example, to use the Spanish stemming module:

FuzzyIndexingMode Stemming_es

Stem or Stemming_en
**This option is no longer supported.**

Selects the legacy Swish-e English stemmer.

This is deprecated in favor of the Snowball English stemmer
Stemming_en1.

Words are converted using the Porter stemming algorithm.

From: http://www.tartarus.org/~martin/PorterStemmer/

The Porter stemming algorithm (or Porter stemmer) is a
process for removing the commoner morphological and inflexional
endings from words in English. Its main use is as part of a
term normalisation process that is usually done when setting up
Information Retrieval systems.

This will help a search for "running" to also find "run" and
"runs", for example.

The stemming function does not convert words to their root,
rather programmatically removes endings on words in an attempt
to make similar words with different endings stem to the same
string of characters. It's not a perfect system, and searches
on stemmed indexes often return curious results. For example,
two entirely different words may stem to the same word.

Stemming also can be confusing when used with a wildcard
(truncation). For example, you might expect to find the word
"running" by searching for "runn*". But this fails when using
a stemmed index, as "running" stems to "run", yet searching for
"runn*" looks for words that start with "runn".

Soundex
Soundex was developed in the 1880s so records for people with
similar sounding names could be found more readily. Soundex is
a coded surname based on the way a surname sounds rather than
spelling. Surnames that sound similar, like Smith and Smyth,
are filed together under the same Soundex code. This is mostly
useful for US English.

Soundex should not be used to search for sound-alike words.
Metaphone would be more appropriate for generic sound matching
of words. Soundex should only be used where you need to search
multiple documents for proper names which sound similar. This
is primarily used for indexing genealogical records. This may
be useful for indexing other collections of data consisting
mostly of names. Many common name variations are matched by
Soundex. The only notable exception is the first letter of the
name. The first letter is not matched for sound.

Metaphone and DoubleMetaphone
Words are transformed into a short series of letters
representing the sound of the word (in English). Metaphone
algorithms are often used for looking up mis-spelled words in
dictionary programs.

From: http://aspell.sourceforge.net/metaphone/

Lawrence Philips' Metaphone Algorithm is an algorithm which returns
the rough approximation of how an English word sounds.

The "DoubleMetaphone" mode will sometimes generate two
different metaphones for the same word. This is supposed to be
useful when a word may be pronounced more than one way.

A metaphone index should give results somewhere in between
Soundex and Stemming.

UseStemming [yes|NO]
Put yes to apply word stemming algorithm during indexing, else no.

UseStemming no
UseStemming yes

When UseStemming is set to "yes" every word is stemmed before
placing it in to the index.

This option is deprecated. It has been superceded by
"FuzzyIndexingMode".

UseSoundex [yes|NO]
When UseSoundex is set to "yes" every word is converted to a
Soundex code before placing it in to the index.

This option is deprecated. It has been superceded by
"FuzzyIndexingMode".

IgnoreTotalWordCountWhenRanking [YES|no]
Put yes to ignore the total number of words in the file when
calculating ranking. Often better with merges and small files.
Default is yes.

IgnoreTotalWordCountWhenRanking no

The default was changed from no to yes in version 2.2.

NOTE: must be set to no if you intend to use the -R 1 option when
searching.

MinWordLimit *integer*
Set the minimum length of an word. Shorter words will not be
indexed. The default is 1 (as defined in src/config.h).

MinWordLimit 5

MaxWordLimit *integer*
Set the maximum length of an indexable word. Every longer word will
not be indexed. The Default is 40 (as defined in src/config.h).

WordCharacters *string of characters*
IgnoreFirstChar *string of characters*
IgnoreLastChar *string of characters*
BeginCharacters *string of characters*
EndCharacters *string of characters*
These settings define what a word consists of to the Swish-e
indexing engine. Compiled in defaults are in src/config.h.

When indexing Swish-e uses WordCharacters to split up the document
into words. Words are defined by any string of non-blank
characters that contain only the characters listed in
WordCharacters. If a string of characters includes a character
that is not in WordCharacters then the word will be spit into two
or more separate words.

For example:

WordCharacters abde

Would turn "abcde" into two words "ab" and "de".

Next, of these words, any characters defined in IgnoreFirstChar are
stripped off the start of the word, and IgnoreLastChar characters
are stripped off the end of the word. This allows, for example,
periods within a word (www.slashdot.com), but not at the end of a
word. Characters in IgnoreFirstChar and IgnoreLastChar must be in
WordCharacters.

Finally, the resulting words MUST begin with one of the characters
listed in BeginCharacters and end with one of the characters listed
in EndCharacters. BeginCharacters and EndCharacters must be a
subset of the characters in WordCharacters. Often, WordCharacters,
BeginCharacters and EndCharacters will all be the same.

Note that the same process applies to the query while searching.

Getting these settings correct will take careful consideration and
practice. It's helpful to create an index of a single test file,
and then look at the words that are placed in the index (see the
"-v 4", "-D" and "-k" searching switches).

Currently there is only support for eight-bit characters.

Example:

WordCharacters .abcdefghijklmnopqrstuvwxyz
BeginCharacters abcdefghijklmnopqrstuvwxyz
EndCharacters abcdefghijklmnopqrstuvwxyz
IgnoreFirstChar .
IgnoreLastChar .

So the string

Please visit http://www.example.com/path/to/file.html.

will be indexed as the following words:

please
visit
http
www.example.com
path
to
file.html

Which means that you can search for "www.example.com" as a single
word, but searching for just "example" will not find the document.

Note: when indexing HTML documents HTML entities are converted to
their character equivalents before being processed with these
directives. This is a change from previous versions of Swish-e
where you were required to include the characters "0123456789&#;"
to index entities. See also "ConvertHTMLEntities"

Buzzwords [*list of buzzwords*|File: path]
The Buzzwords option allows you to specify words that will be
indexed regardless of WordCharacters, BeginCharacters,
EndCharacters, stemming, soundex and many of the other checks done
on words while indexing.

Buzzwords are case insensitive.

Buzzwords should be separated by spaces and may span multiple
directives. If the special format "File:filename" is used then the
Buzzwords will be read from an external file during indexing.

Examples:

Buzzwords C++ TCP/IP

Buzzwords File: ./buzzwords.lst

If a Buzzword contains search operator characters they must be
backslashed when searching. For example:

Buzzwords C++ TCP/IP web=http

./swish-e -w 'web\=http'

Buzzwords are found by splitting the text on whitespace, removing
"IgnoreFirstChar" and "IgnoreLastChar" characters from the word,
and then comparing with the list of "Buzzwords". Therefore, if
adding "Buzzwords" to an index you will probably want to define
"IgnoreFirstChar" and "IgnoreLastChar" settings.

Note: Buzzwords specific settings for "IgnoreFirstChar" and
"IgnoreLastChar" may be used in the future.

CompressPositions [yes|NO]
This option enables zlib compression for individual word data in
the index file. The default is NO, that is the index word data is
not compressed by default.

Enabling this option can reduced the size of the index file, but at
the expense of slower wildcard search times.

The default changed from YES to NO starting with version 2.4.3.

IgnoreWords [*list of stop words*|File: path]
The IgnoreWords option allows you to specify words to ignore,
called stopwords. The default is to not use any stopwords.

Words should be separated by spaces and may span multiple
directives. If the special format "File:filename" is used then the
stop words will be read from an external file during indexing.

In previous versions of Swish-e you could use the directive

IgnoreWords swishdefault - obsolete!

to include a default list of compiled in stopwords. This keyword
is no longer supported.

Examples:

IgnoreWords www http a an the of and or

IgnoreWords File: ./stopwords.de

UseWords [*list of words*|File: path]
UseWords defines the words that Swish-e will index. Only the words
listed will be indexed.

You can specify a list of words following the directive (you may
specify more than one "UseWords" directive in a config file),
and/or use the "File:" form to specify a path to a file containing
the words:

UseWords perl python pascal fortran basic cobal php
UseWords File: /path/to/my/wordlist

Please drop the Swish-e list a note if you actually use this
feature. It may be removed from future versions.

IgnoreLimit *integer integer*
This automatically omits words that appear too often in the files
(these words are called stopwords). Specify a whole percentage and
a number, such as "80 256". This omits words that occur in over 80%
of the files and appear in over 256 files. Comment out to turn off
auto-stopwording.

IgnoreLimit 50 1000

Swish-e must do extra processing to adjust the entire index when
this feature is used. It is recommended that instead of using this
feature that you decided what words are stopwords and add them to
IngoreWords in your configuration file. To do this, use
IgnoreLimit one time and note the stop words that are found while
indexing. Add this list to IgnoreWords, and then remove
IgnoreLimit from the configuration file.

IgnoreMetaTags *list of names*
"IgnoreMetaTags" defines a list of metatags to ignore while
indexing XML files (and HTML files if using libxml2 for parsing
HTML). All text within the tags will be ignored -- both for
indexing ("MetaNames") and properties ("PropertyNames"). To still
parse properties, yet do not index the text, see
"UndefinedMetaTags".

This option is useful to avoid indexing specific data from a file.
For example:

<person>
<first_name>
William
</first_name> <last_name>
Shakespeare
</last_name> <updated_date>
April 25, 1999
</updated_date>
</person>

In the above example you might not want to index the updated date,
and therefore prevent finding this record by searching

-w 'person=(April)'

This is solved by:

IgnoreMetaTags updated_date

See also the "-l" switch in SWISH-RUN.

FileRules [type] [contains|is|regex] *regular expression*
FileMatch [type] [contains|is|regex] *regular expression*
FileRules and FileMatch are used to, respectively, exclude and
include files and directories to index. Since, by default, Swish-e
indexes all files and recurses all directories (but see also
"FollowSymLinks") you will typically only use "FileRules" to
exclude files or directories. "FileMatch" is useful in a few
cases, for example, to override the behavior of "IndexOnly". Some
examples are included below.

Except for "FileRules title ...", this feature is only available
for file access method (-S fs), which is the default indexing mode.
Also, any pathname modification with "ReplaceRules" happens after
the check for "FileRules". (It's unlikely that you would exclude
files with "FileRules" based on text you added with
"ReplaceRules"!)

The regular expression is a C regex.h extended regular expression.
You may supply more than one regular expression per line, or use
separate directives. Preceding the regular expression with the
word "not" negates the match.

The regular expression is compared against [type] as described
below.

For historical reasons, you can specify "contains" or "is". "is"
simply forces the regular expression to match at the start and end
of the string (by internally prepending "^" and appending "$" to
the regular expression).

The "regex" option requires delimiter characters:

FileRules title regex /^private/i

The only advantage of "regex" is if you want to do case insensitive
matches, or simply like your regular expressions to look like perl
regular expressions. You must use matching delimiters; (), {}, and
[], are not currently supported for no good reason other than
laziness.

Use quotes (" or ') around a pattern if it contains any white
space. Note that the backslash character becomes the escape
character within quotes.

For example, these sets generate the same regular expressions.

FileRules title is hello
FileRules title contains ^hello$
FileRules title regex /^hello$/

These all need quotes due to the included space character

FileRules title is "hello there"
FileRules title contains "^hello there$"
FileRules title regex "!^hello there$!"

These show how the backslash must be doubled inside of quotes.
Swish-e converts a double-backslash into a single backslash, and
then passes that single onto the regular expression compiler.

FileRules filename regex /\.pdf/
FileRules filename regex "/\\.pdf/"

FileRules filename regex !hello\\there! # need double for real backslash
FileRules filename regex "!hello\\\\there!" # need double-double inside of quotes

Matching Types

The following types of match strings my be supplied:

FileRules pathname
FileRules dirname
FileRules filename
FileRules directory
FileRules title

FileMatch pathname
FileMatch filename
FileMatch dirname
FileMatch directory

pathname matches the regular expression against the current
pathname. The pathname may or may not be absolute depending on
what you supplied to "IndexDir".

Example:

# Don't index paths that contain private or hidden
FileRules pathname contains (private|hidden)

# Same thing
FileRules pathname regex /(private|hidden)/

# Don't index exe files
FileRules pathname contains \.exe$

dirname and filename split the path name by the last delimiter
character into a directory name, and a file name. Then these are
compared against the patterns supplied. Directory names do not
have a trailing slash. All path names use the forward slash as a
delimiter within Swish-e.

Example:

# Same as last example - don't index *.exe files.
FileRules filename contains \.exe$

# Don't index any file called test.html files
FileRules filename contains ^test\.html$

# Same thing
FileRules filename is test\.html

# Don't index any directories that contain "old" (/usr/local/myold/docs)
FileRules dirname contains old

# Don't index any directories that contain the path segment "old" (/usr/local/old/foo)
FileRules dirname contains /old/

# Index only .htm, .html, plus any all-digit file names
IndexOnly .htm .html
FileMatch filename contains ^\d+$

# Same as previous, but maybe a little slower
FileRules filename regex not !\.(htm|html)$!
FileMatch filename contains ^\d+$

Swish-e checks these settings in the order of "pathname",
"dirname", and "filename", and "FileMatch" patterns are checked
before "FileRules", in general. This allows you to exclude most
files with "FileRules", yet allow in a few special cases with
"FileMatch". For example:

# Exclude all files of .exe, .bin, and .bat
FileRules filename contains \.(exe|bin|bat)$
# But, let these two in
FileMatch filename is baseball\.bat incoming_mail\.bin

# Same, but as a single pattern
FileMatch filename is (baseball\.bat|incoming_mail\.bin)

The "directory" type is somewhat unique. When Swish-e recurses into
a directory it will compare all the files in the directory with the
pattern and then decide if that entire directory should or should
not be indexed (or recursed). Note that you are matching against
file names in a directory -- and some of those names may be
directory names.

A "FileRules directory" match will cause Swish-e to ignore all
files and sub-directories in the current directory.

Warning: A match with "FileMatch directory" says to index
everything in the *current* directory and ignore any FileRules for
this directory.

Example:

# Don't index any directories (and sub directories) that contain
# a file (or sub-directory) called "index.skip"
FileRules directory contains ^index\.skip$

# Don't index directories that contain a .htaccess file.
FileRules directory contains ^\.htaccess

"title" checks for a pattern match in an HTML title.

Example:

FileRules title contains construction example pointers

# This example says to ignore case
FileRules title regex "/^Internal document/i"

Note: "FileRules title" works for any input method (fs, prog, or
http) that is parsed as HTML, and where a title was found in the
document.

In case all this seems a bit confusing, processing a directory
happens in the following order.

First the directory name is checked:

FileRules dirname - reject entire directory if matches

Next the directory is scanned and each file name (which might be
the name of a sub-directory) is checked:

FileRules directory - reject entire dir if *any* files match
FileMatch directory - accept entire dir if *any* files match

Then, unless "FileMatch directory" matched, each file is tested
with FileMatch. A match says to index the file without further
testing (i.e. overrides FileRules and IndexOnly):

FileMatch pathname \
FileMatch dirname - file is accepted if any match
FileMatch filename /

otherwise

IndexOnly - file is checked for the correct file extension

FileRules pathname \
FileRules dirname - file is rejected if any match
FileRules filename /

finally, the file is indexed.

Files (not directories) listed with "IndexDir" or "-i" are
processed in a similar way:

FileMatch pathname \
FileMatch dirname - file is accepted if any match
FileMatch filename /

otherwise, the file is rejected if it doesn't have the correct
extension or a FileRules matches.

IndexOnly - file is checked for the correct file extension

FileRules pathname \
FileRules dirname - file is rejected if any match
FileRules filename /

Note: If things are not indexing as you expect, create a directory
with some test files and use the "-T regex" trace option to see how
file names are checked. Start with very simple tests!

Directives for the HTTP Access Method Only

The HTTP Access method is enabled by the "-S http" switch when
indexing. It works by running a Perl program called SwishSpider which
fetches documents from a web server.

Only text files (content-type of "text/*") are indexed with the HTTP
Access Method. Other document types (e.g. PDF or MSWord) may be
indexed as well. The SwishSpider will attempt to make use of the
SWISH::Filter module (included with the Swish-e distribution) to
convert documents into a format that Swish-e can index.

Note: The -S prog method of spidering (using spider.pl) can be a
replacement for the -S http method. It offers more configuration
options and better spidering speed.

These directives below are available when using the HTTP Access Method
of indexing.

MaxDepth *integer*
MaxDepth defines how many links the spider should follow before
stopping. A value of 0 configures the spider to traverse all
links. The default is MaxDepth 0.

MaxDepth 5

Note: The default was changed from 5 to 0 in release 2.4.0

Delay *seconds*
The number of seconds to wait between issuing requests to a server.
This setting allows for more friendly spidering of remote sites.
The default is 5 seconds.

Delay 1

Note: The default was changed from 60 to 5 seconds in release 2.4.0

TmpDir *path*
The location of a writable temp directory on your system. The HTTP
access method tells the Perl helper to place its files in this
location, and the "-e" switch causes Swish-e to use this directory
while indexing. There is no default.

TmpDir /tmp/swish

If this directory does not exist or is not writable Swish-e will
fail with an error during indexing.

Note, the environment variables of "TMPDIR", "TMP", and "TEMP" (in
that order) will override this setting.

SpiderDirectory *path*
The location of the Perl helper script called swishspider. If you
use a relative directory, it is relative to your directory when you
run Swish-e, not to the directory that Swish-e is in. The default
is the location swishspider was installed. Normally this does not
need to be set.

SpiderDirectory /usr/local/swish

EquivalentServer *server alias*
Often times the same site may be referred to by different names. A
common example is that often http://www.some-server.com and
http://some-server.com are the same. Each line should have a list
of all the method/names that should be considered equivalent.
Multiple EquivalentServer directives may be used. Each directive
defines its own set of equivalent servers.

EquivalentServer http://library.berkeley.edu http://www.lib.berkeley.edu
EquivalentServer http://sunsite.berkeley.edu:2000 http://sunsite.berkeley.edu

Directives for the prog Access Method Only

This section details the directives that are only available for the
"prog" document source feature of Swish-e. The "prog" access method
runs an external program that "feeds" documents to Swish-e. This
allows indexing and filtering of documents from any source.

See prog - general purpose access method in the SWISH-RUN man page for
more information.

A number of example programs for use with the "prog" access method are
provided in the prog-bin directory. Please see those example if you
have questions about implementing a "prog" input program.

SwishProgParameters *list of parameters*
This is a list of parameters that will be sent to the external
program when running with the "prog" document source method.

SwishProgParameters /path/to/config hello there
IndexDir /path/to/program.pl

Then running:

swish-e -c config -S prog

Swish-e will execute "/path/to/program.pl" and pass
"/path/to/config hello there" as three command line arguments to
the program. This directive makes it easy to pass settings from
the Swish-e configuration file to the external program.

For example, the "spider.pl" program (included in the "prog-bin"
directory) uses the "SwishProgParameters" to specify what file to
read for configuration information.

SwishProgParameters spider.config
IndexDir ./spider.pl

The "spider.pl" program also has a default action so you can avoid
using a configuration file:

SwishProgParameters default http://www.swishe.org/ http://some.other.site/
IndexDir ./spider.pl

And the spider program will use default settings for spidering
those sites.

Swish-e can read documents from standard input, so another way to
run an external program with parameters is:

./spider.pl spider.conf | ./swish-e -S prog -i stdin

Notes when using MS Windows

You should use unix style path separators to specify your external
program. Swish will convert forward slashes to backslashes before
calling the external program. This is only true for the program name
specified with "IndexDir" or the "-i" command line option.

In addition, Swish-e will make sure the program specified actually
exists, which means you need to use the full name of the program.

For example, to run the perl spider program spider.pl you would need a
Swish-e configuration file such as:

IndexDir e:/perl/bin/perl.exe
SwishProgParameters prog-bin/spider.pl default http://swish-e.org

and run indexing with the command:

swish-e -c swish.cfg -S prog -v 9

The "IndexDir" command tells Swish-e the name of the program to run.
Under unix you can just specify the name of the script, since unix will
figure out the program from the first line of the script.

The "SwishProgParameters" are the parameters passed to the program
specified by "IndexDir" (perl.exe in this case). The first parameter
is the perl script to run (prog-bin/spider.pl). Perl passes the rest
of the parameters directly to the perl script. The second parameter
default tells the spider.pl program to use default settings for
spidering (or you could specify a spider config file -- see "perldoc
spider.pl" for details), and lastly, the URL is passed into the spider
program.

Document Filter Directives

Internally, Swish-e knows how to parse only text, HTML, and XML
documents. With "filters" you can index other types of documents. For
example, if all your web pages are in gzip format a filter can
uncompress these on the fly for indexing.

You may wish to read the Swish-e FAQ question on filtering before
continuing here. How Do I filter documents?

There are two suggested methods for filtering.

Filtering with SWISH::Filter

The Swish-e distribution includes a Perl module called SWISH::Filter
and individual filters located in the filters directory. This system
uses plug-in filters to extend the types of documents that Swish-e can
index. The plug-in filters do not actually do the filtering, but
rather provide a standard interface for accessing programs that can
filter or convert documents. The programs that do the filtering are
not part of the Swish-e distribution; they must be downloaded and
installed separately.

The advantage of this method is that new filtering methods can be
installed easily.

This system is designed to work with the -S http and -prog methods, but
may also be used with the "FileFilter" feature and -S fs indexing
method. See
$prefix/share/doc/swish-e/examples/filter-bin/swish_filter.pl for an
example.

See the filters/README file for more information.

Filtering with the FileFilter feature

A filter is an external program that Swish-e executes while processing
a document of a given type. Swish-e will execute the filter program
for each file that matches the file suffix (extension) set in the
FileFilter or FileFilterMatch directives. FileFilterMatch matches
using regular expressions and is described below.

Filters may be used with any type of input method (i.e. -S fs, -S http,
or -S prog). But because

Swish-e calls the external program passing as default arguments:

$0 the name of the filter program

$1 the physical path name of the file to read. This may be a
temporary file location if indexing by the http method.

$2 When indexing under the file system this will be the same as $1
(the path to the source file), but when indexing under the http
method this will be the URL of the source document.

Swish-e can also pass other parameters to the filter program. These
parameters can be defined using the FileFilter or FileFilterMatch
directives. See Filter Options below.

The filter program must open the file, process its contents, and return
it to Swish-e by printing to STDOUT.

Note that this can add a significant amount of time to the indexing
process if your external program is a perl or shell script. If you
have many files to filter you should consider writing your filter in C
instead of a shell or perl script, or using the "prog" Access Method
along with SWISH::Filter.

FilterDir *path-to-directory*
Deprecated.

This is the path to a directory where the filter programs are
stored. Swish-e looks in this directory to find the filter
specified in the FileFilter directive.

This directive is not needed if the filter program can be found in
your system's path. Even if your filter is not in your system's
path you can specify the full path to the filter in the FileFilter
or FileFilterMatch directives.

Example:

FilterDir /usr/local/swish/filters

FileFilter *suffix* "filter-prog" ["filter-options"]
This maps file suffix (extension) to a filter program. If filter-
prog starts with a directory delimiter (absolute path), Swish-e
doesn't use the FilterDir settings, but uses the given filter-prog
path directly.

On systems that have a working fork(2) system call the filter
program is run by forking swish then executing the filter. This
mean the shell is not used for running the filter and no arguments
are passed through the shell.

On other systems (e.g. Windows) the arguments are double-quoted and
popen(3) is used to run the program. This does pass argument
though the shell and may be a security concern depending on the
abilities of the shell.

Filter options:

Filter options are a string passed as arguments to the filter-prog.
Filter options can contain variables, replaced by Swish-e. If you
omit filter-options Swish-e will use default parameters for the
options listed above.

Default: %p %P
Which means: pass "workfile path" and "documentfile path" to filter.

Variables in filter options:

%% = %
%P = Full document pathname (e.g. URL, or path on filesystem)
%p = Full pathname to work file (maybe a tmpfile or the real document path on filesystem)
%F = Filename stripped from full document pathname
%f = Filename stripped from "work" pathname
%D = Directoryname stripped from full document pathname
%d = Directoryname stripped from full "work" pathname

Examples of strings passed:

%P = document pathname: http://myserver/path1/mydoc.txt
%p = work pathname: /tmp/tmp.1234.mydoc.txt
%F = mydoc.txt
%f = tmp.1234.mydoc.txt
%D = http://myserver/path1
%d = /tmp

Notes when using MS Windows

Windows uses double quotes to escape shell metacharacters, so if
you need to use quotes then use single quotes around the entire
option string.

FileFiler .mydoc mydocfilter.exe '--title "text with spaces"'

You can specify the filter program using forward slashes (unix
style). Swish will convert the slashes to backslashes before
running your program.

FileFilter .mydoc c:/some/path/mydocfilter.exe '-d "%d" -example -url "%P" "%f"'

Examples of filters:

FileFilter .doc /usr/local/bin/catdoc "-s8859-1 -d8859-1 %p"
FileFilter .pdf pdftotext "%p -"
FileFilter .html.gz gzip "-c %p"
FileFilter .mydoc "/some/path/mydocfilter" "-d %d -example -url %P %f"

The above examples are running a binary filter program. For more
complicated filtering needs you may use a scripting language such
as Perl or a shell script. Here's some examples of calling a shell
and perl script:

FileFilter .pdf pdf2html.sh
FileFilter .ps ghostscript-filter.pl

Using a scripting language (or any language that has a large
startup cost) can greatly increase the indexing time. For small
indexing jobs, this may not be an issue, but for large collections
of files that require processing by a scripting language, you may
be better off using the "-S prog" access method where the script
will only be compiled once, instead of for each document.

Filters are probably easier to write than a "-S prog" program.
Which you decide to use depends on your requirements. Examples of
filter scripts can be found in the filter-bin directory, and
examples of "-S prog" programs can be found in the prog-bin
directory.

FileFilterMatch *filter-prog* *filter-options* *regex* [*regex*
...]
This is similar to "FileMatch" except uses regular expressions to
match against the file name. *filter-prog* is the path to the
program. Unlike "FileFilter" this does not use the "FilterDir"
option. Also unlike "FileFilter" you must specify the
*filter-options*.

Examples:

FileFilterMatch ./pdftotext "%p -" /\.pdf$/

Note that will also match a file called ".pdf", so you may want to
use something that requires a filename that has more than just an
extension. For example:

FileFilterMatch ./pdftotext "%p -" /.\.pdf$/

To specify more than one extension:

FileFilterMatch ./check_title.pl "%p" /\.html$/ /\.htm$/

Or a few ways to do the same thing:

FileFilterMatch ./check_title.pl %p /\.(html|html)$/
FileFilterMatch ./check_title.pl %p /\.html?$/

And to ignore case:

FileFilterMatch ./check_title.pl %p /\.html?$/i

You may also precede an expression with "not" to negate regular
expression that follow. For example, to match files that do not
have an extension:

FileFilterMatch ./convert "%p %P" not /\..+$/

Document Info
$Id: SWISH-CONFIG.pod 1846 2006-10-20 20:18:30Z whmoseley $

2.4.7 2009-04-04 SWISH-CONFIG(1)