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FormattedSearch 8 - 17 May 2002 - Main.PeterThoeny
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META TOPICPARENT name="TWikiVariables"
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 Note: For $pattern(reg-exp), specify a RegularExpression that scans from start to end and contains the text you want to keep in parenthesis, like $pattern(.*?(from here.*?to here).*). You need to make sure that the integrity of a web page is not compromised; for example, if you include a table make sure to include everything including the table end tag.
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Nested Search

Search can be nested. For example, search for some topics, then form a new search for each topic found in the first search. The idea is to build the nested search string using a formatted search in the first search.

Here is an example. We want to search for topics, do a nested search with each hit, and show the result as nested bullets. Parameters like scope="text" regex="on" nosearch="on" nototal="on" are omitted for simplicity.

  • First search:
    • %SEARCH{ "freedom" format="   * $topic" }%
  • Second search. For each hit we want this search:
    • %SEARCH{ "(topic of first search)" format="      * $topic" }%
  • Now we nest the searches. We need to escape the second search, e.g. the first search will build a valid second search string:
    • %SEARCH{ "freedom" format="   * $topic: $n$percntSEARCH{ \"$topic\" format=\"      * $dollartopic" }$nop%\" }%

Note that we escape the second search so that it does not get evaluated by the first search:

  • $percnt to escape the leading percent of the second search
  • \" to escape the qouble quotes
  • $dollar to escape the $ of $topic
  • $nop to escape the }% sequence
 

Examples

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Bullet list showing topic name and summary

Changed:
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<		Write this:
>
>		Write this:
 %SEARCH{ "FAQ" scope="topic" nosearch="on" nototal="on" header="   * *Topic: Summary:*" format="   * [[$topic]]: $summary" }%
Changed:
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<		To get this:
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>		To get this:
 
  • Topic: Summary:
  • NatSkinFAQ: NatSkinFAQ The documentation of NatSkin is crap. I'm lost! If you need help there are a couple of options: Create a support request on TWiki:Support/WebHome ...
  • TWikiFAQ: Frequently Asked Questions About TWiki This is a real FAQ, and also a demo of an easily implemented knowledge base solution. To see how it's done, view the source ...
  • TWikiFaqTemplate: FAQ: Answer: Back to: TWikiFAQ
  • TextFormattingFAQ: Text Formatting FAQ The most frequently asked questions about text formatting are answered. Also, TextFormattingRules contains the complete TWiki shorthand system ...
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  • Topic: Summary:
  • NatSkinFAQ: NatSkinFAQ The documentation of NatSkin is crap. I'm lost! If you need help there are a couple of options: Create a support request on TWiki:Support/WebHome ...
  • TWikiFAQ: Frequently Asked Questions About TWiki This is a real FAQ, and also a demo of an easily implemented knowledge base solution. To see how it's done, view the source ...
  • TWikiFaqTemplate: FAQ: Answer: Back to: TWikiFAQ
  • TextFormattingFAQ: Text Formatting FAQ The most frequently asked questions about text formatting are answered. Also, TextFormattingRules contains the complete TWiki shorthand system ...
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Table showing form field values of topics with a form

Changed:
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<		Write this in the Know web:
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>		Write this in the Know web:
 | *Topic:* | *OperatingSystem:* | *OsVersion:* |
%SEARCH{ "[T]opicClassification.*?value=\"[P]ublicFAQ\"" scope="text" regex="on" nosearch="on" nototal="on" format="| [[$topic]] | $formfield(OperatingSystem) | $formfield(OsVersion) |" }%
Changed:
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<		To get this:
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>		To get this:
 
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95
Added:
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Extract some text from a topic using regular expression

Changed:
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<		Write this:
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>		Write this:
 %SEARCH{ "__Back to\:__ TWikiFAQ" scope="text" regex="on" nosearch="on" nototal="on" header="TWiki FAQs:" format="   * $pattern(.*?FAQ\:[\n\r]*([^\n\r]+).*) [[$topic][Answer...]]" }%
Changed:
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<		To get this:
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>		To get this:
 TWiki FAQs:
  • How can I create a simple TWiki Form based application? Answer...
  • How do I delete or rename a topic? Answer...
  • How do I delete or rename a file attachment? Answer...
  • Why does the topic revision not increase when I edit a topic? Answer...
  • TWiki has a GPL (GNU General Public License). What is GPL? Answer...
  • I've problems with the WebSearch. There is no Search Result on any inquiry. By clicking the Index topic it's the same problem. Answer...
  • What happens if two of us try to edit the same topic simultaneously? Answer...
  • I would like to install TWiki on my server. Can I get the source? Answer...
  • What does the "T" in TWiki stand for? Answer...
  • So what is this WikiWiki thing exactly? Answer...
  • Everybody can edit any page, this is scary. Doesn't that lead to chaos? Answer...
Added:
>
>

Nested Search

Search can be nested. For example, search for some topics, then form a new search for each topic found in the first search. The idea is to build the nested search string using a formatted search in the first search.

Here is an example. Let's search for all topics that contain the word "culture" (first search), and let's find out where each topic found is linked from (second search).

  • First search:
    • %SEARCH{ "culture" format="   * $topic is referenced by: (list all references)" nosearch="on" nototal="on" }%
  • Second search. For each hit we want this search:
    • %SEARCH{ "(topic found in first search)" format="   $topic" nosearch="on" nototal="on" }%
  • Now let's nest the two. We need to escape the second search, e.g. the first search will build a valid second search string. Note that we escape the second search so that it does not get evaluated prematurely by the first search:
    • Use $percnt to escape the leading percent of the second search
    • Use \" to escape the double quotes
    • Use $dollar to escape the $ of $topic
    • Use $nop to escape the }% sequence

Write this:

%SEARCH{ "culture" format="   * $topic is referenced by:$n      * $percntSEARCH{ \"$topic\" format=\"   $dollartopic\" nosearch=\"on\" nototal=\"on\" }$nop%" nosearch="on" nototal="on" }%

To get this:

 -- PeterThoeny? - 16 May 2002

Revision 8r8 - 17 May 2002 - 06:57:28 - PeterThoeny?
Revision 7r7 - 20 Apr 2002 - 02:37:00 - PeterThoeny?
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