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-%TOC% %STARTINCLUDE% <a name="MetaDataDefinition"></a>
-
-# <a name="TWiki_Meta_Data"> TWiki Meta Data </a>
-
-## <a name="What_is_Meta_Data_in_TWiki_"> What is Meta Data in TWiki? </a>
-
-**_What, indeed!_**
-
-### <a name="Defining_Meta_Data_Variables"> Defining Meta Data Variables </a>
-
-See Meta Data Rendering for variables used to display meta data.
-
-Current version: **1\.0**
-
-### <a name="Syntax"> Syntax </a>
-
-* Format is as for \[[TWikiDocumentation#TWiki\_Variables, except all fields have a key.
-  * %META:&lt;type&gt;\{key1="value1" [key2="value2" [...]]\}%
-* Order of fields within the meta variables is not defined, except that if there is a field with key `name`, this appears first for easier searching (note the order of the variables themselves is defined)
-* Each meta variable is on one line
-* '\\n' is represented in values by <code>**%\_N\_**</code> and '"' by <code>**%\_Q\_%**</code>
-
-> **Example of Format**
->
->     %<nop>META:TOPICINFO{version="1.6" date="976762663" author="PeterThoeny" format="1.0"}%
->        text of the topic
->     %<nop>META:TOPICMOVED{from="Codev.OldName" to="CoDev.NewName"
->        by="JohnTalintyre" date="976762680"}%
->     %<nop>META:TOPICPARENT{name="NavigationByTopicContext"}%
->     %<nop>META:FILEATTACHMENT{name="Sample.txt" version="1.3" ... }%
->     %<nop>META:FILEATTACHMENT{name="Smile.gif" version="1.1" ... }%
->     %<nop>META:FORM{name="WebFormTemplate"}%
->     %<nop>META:FIELD{name="OperatingSystem" value="OsWin"}%
->     %<nop>META:FIELD{name="TopicClassification" value="PublicFAQ"}%
-
-### <a name="Specifications"> Specifications </a>
-
-#### <a name="TOPICINFO"> </a> TOPICINFO
-
-<table border="1" cellpadding="1" cellspacing="0">
-  <tr>
-    <th align="center" bgcolor="#99CCCC"><strong>Key</strong></th>
-    <th align="center" bgcolor="#99CCCC"><strong>Comment</strong></th>
-  </tr>
-  <tr>
-    <td> version </td>
-    <td> Same as RCS version </td>
-  </tr>
-  <tr>
-    <td> date </td>
-    <td> integer, unx time, seconds since start 1970 </td>
-  </tr>
-  <tr>
-    <td> author </td>
-    <td> last to change topic, is the REMOTE_USER </td>
-  </tr>
-  <tr>
-    <td> format </td>
-    <td> Format of this topic, will be used for automatic format conversion </td>
-  </tr>
-</table>
-
-#### <a name="TOPICMOVED"> </a> TOPICMOVED
-
-This is optional, exists if topic has ever been moved. If a topic is moved more than once, only the most recent TOPICMOVED meta variable exists in the topic, older ones are to be found in the rcs history.
-
-%META:TOPICMOVED\{from="Codev.OldName" to="CoDev.NewName" by="talintj" date="976762680"\}%
-
-<table border="1" cellpadding="1" cellspacing="0">
-  <tr>
-    <th align="center" bgcolor="#99CCCC"><strong>Key</strong></th>
-    <th align="center" bgcolor="#99CCCC"><strong>Comment</strong></th>
-  </tr>
-  <tr>
-    <td> from </td>
-    <td> Full name i.e. web.topic </td>
-  </tr>
-  <tr>
-    <td> to </td>
-    <td> Full name i.e. web.topic </td>
-  </tr>
-  <tr>
-    <td> by </td>
-    <td> Who did it, is the REMOTE_USER, not <nop>WikiName </nop></td>
-  </tr>
-  <tr>
-    <td> date </td>
-    <td> integer, unx time, seconds since start 1970 </td>
-  </tr>
-</table>
-
-Notes:
-
-* at present version number is not supported directly, it can be inferred from the RCS history.
-* there is only one META:TOPICMOVED in a topic, older move information can be found in the RCS history.
-
-#### <a name="TOPICPARENT"> </a> TOPICPARENT
-
-<table border="1" cellpadding="1" cellspacing="0">
-  <tr>
-    <th bgcolor="#99CCCC"><strong>Key</strong></th>
-    <th bgcolor="#99CCCC"><strong>Comment</strong></th>
-  </tr>
-  <tr>
-    <td> name </td>
-    <td> The topic from which this was created, <span style="background:"><font color="">Web Home</font></span><a href="http://LOCATION/WebHome">?</a> if done from <code>Go</code>, othewise topic where <code>?</code> or form used. Normally just topic, but is full web.topic format if parent is in a different Web. Renaming a Web will then only break a few of these references or they can be scanned and fixed. </td>
-  </tr>
-</table>
-
-#### <a name="FILEATTACHMENT"> </a> FILEATTACHMENT
-
-<table border="1" cellpadding="1" cellspacing="0">
-  <tr>
-    <th bgcolor="#99CCCC"><strong>Key</strong></th>
-    <th bgcolor="#99CCCC"><strong>Comment</strong></th>
-  </tr>
-  <tr>
-    <td> name </td>
-    <td> Name of file, no path. Must be unique within topic </td>
-  </tr>
-  <tr>
-    <td> version </td>
-    <td> Same as RCS revision </td>
-  </tr>
-  <tr>
-    <td> path </td>
-    <td> Full path file was loaded from </td>
-  </tr>
-  <tr>
-    <td> size </td>
-    <td> In bytes </td>
-  </tr>
-  <tr>
-    <td> date </td>
-    <td> integer, unx time, seconds since start 1970 </td>
-  </tr>
-  <tr>
-    <td> user </td>
-    <td> the REMOTE_USER, not <nop>WikiName </nop></td>
-  </tr>
-  <tr>
-    <td> comment </td>
-    <td> As supplied when file uploaded </td>
-  </tr>
-  <tr>
-    <td> attr </td>
-    <td><code>h</code> if hidden, optional </td>
-  </tr>
-</table>
-
-Extra field that are added if an attachment is moved:
-
-<table border="1" cellpadding="1" cellspacing="0">
-  <tr>
-    <td> movedfrom </td>
-    <td> full topic name - web.topic </td>
-  </tr>
-  <tr>
-    <td> movedby </td>
-    <td> the REMOTE_USER, not <nop>WikiName </nop></td>
-  </tr>
-  <tr>
-    <td> movedto </td>
-    <td> full topic name - web.topic </td>
-  </tr>
-  <tr>
-    <td> moveddate </td>
-    <td> integer, unx time, seconds since start 1970 </td>
-  </tr>
-</table>
-
-#### <a name="FORM"> </a> FORM
-
-<table border="1" cellpadding="1" cellspacing="0">
-  <tr>
-    <th bgcolor="#99CCCC"><strong>Key</strong></th>
-    <th bgcolor="#99CCCC"><strong>Comment</strong></th>
-  </tr>
-  <tr>
-    <td> name </td>
-    <td> A topic name - the topic is a <span style="background:"><font color="">Form Template</font></span><a href="http://LOCATION/TWikiDocumentation">?</a>. Can optionally include the web name i.e. web.topic, but doesn't normally </td>
-  </tr>
-</table>
-
-#### <a name="FIELD"> </a> FIELD
-
-Should only be present if there is a FORM entry. Note that this data is used when viewing a topic, the form template definition is not read.
-
-<table border="1" cellpadding="1" cellspacing="0">
-  <tr>
-    <th bgcolor="#99CCCC"><strong>Key</strong></th>
-    <th bgcolor="#99CCCC"><strong>Name</strong></th>
-  </tr>
-  <tr>
-    <td> name </td>
-    <td> Ties to entry in <span style="background:"><font color="">Form Template</font></span><a href="http://LOCATION/TWikiDocumentation">?</a>, is title with all bar alphanumerics and . removed </td>
-  </tr>
-  <tr>
-    <td> title </td>
-    <td> Full text from <span style="background:"><font color="">Form Template</font></span><a href="http://LOCATION/TWikiDocumentation">?</a></td>
-  </tr>
-  <tr>
-    <td> value </td>
-    <td> Value user has supplied via form </td>
-  </tr>
-</table>
-
-### <a name="Recommended_Sequence"> Recommended Sequence </a>
-
-There no absolute need for meta data variables to be in a specific order, however, it does for the following reasons:
-
-* Keep (form) fields in the order they are defined
-* Allow diff command to give output in a logically sensible order
-
-These could be done in other ways, but this adds complexity
-
-* Order fields - definition could be read on each rendering (expensive)
-* Diff - render data before doing diff, has something to offer, but not likely to be available for next TWiki release
-
-So the order is:
-
-* TOPICINFO
-* text of topic
-* TOPICMOVED - optional
-* TOPICPARENT - optional
-* FILEATTACHMENT - 0 or more entries
-* FORM - optional
-* FIELD - 0 or more entries (FORM required)
-
-### <a name="Viewing_Meta_Data_in_Page_Source"> Viewing Meta Data in Page Source </a>
-
-When viewing a topic the <code>**Raw Text**</code> link can be clicked to show the text of a topic (ie: as seen when editing). This is done by adding `raw=on` to URL. `raw=debug` shows the meta data as well as the topic data, ex: [debug view for this topic](%SCRIPTURLPATH%/view%SCRIPTSUFFIX%/%WEB%/%TOPIC%?raw=debug)
-
-### <a name="Future_Support_for_Plugins"> Future Support for Plugins </a>
-
-There is currently no support for meta data for Plugins. However, the format is readily extendable and the `Meta.pm` code that supports the format needs only minor alteration.
-
-<a name="MetaDataRendering"></a>
-
-## <a name="Rendering_Meta_Data"> Rendering Meta Data </a>
-
-Various types of meta data can be stored in topics. The data is rendered using the %META% variable. This is mostly used in the <code>**view**</code>, <code>**preview**</code> and <code>**edit**</code> scripts.
-
-Current support is fairly basic:
-
-<table border="1" cellpadding="1" cellspacing="0">
-  <tr>
-    <th bgcolor="#99CCCC"><strong>Variable usage:</strong></th>
-    <th bgcolor="#99CCCC"><strong>Comment:</strong></th>
-  </tr>
-  <tr>
-    <td> %<nop>META{"form"}% </nop></td>
-    <td> Show form data, see <span style="background:"><font color="">Form Templates</font></span><a href="http://LOCATION/TWikiDocumentation">?</a></td>
-  </tr>
-  <tr>
-    <td> %<nop>META{"attachments"}% </nop></td>
-    <td> Show attachments, exclude hidden </td>
-  </tr>
-  <tr>
-    <td> options for attachments: </td>
-  </tr>
-  <tr>
-    <td> all="on" </td>
-    <td> Show ALL attachments (including hidden) </td>
-  </tr>
-  <tr>
-    <td> %<nop>META{"moved"}% </nop></td>
-    <td> Details of any topic moves </td>
-  </tr>
-  <tr>
-    <td> %<nop>META{"parent [options]"}% </nop></td>
-    <td> Show topic parent </td>
-  </tr>
-  <tr>
-    <td> options for parent: </td>
-  </tr>
-  <tr>
-    <td> dontrecurse="on" </td>
-    <td> By default recurses up tree, at some cost </td>
-  </tr>
-  <tr>
-    <td> prefix="..." </td>
-    <td> Prefix for parents, only if there are parents; default "" </td>
-  </tr>
-  <tr>
-    <td> suffix="..." </td>
-    <td> Suffix, only appears if there are parents; default "" </td>
-  </tr>
-  <tr>
-    <td> seperator="..." </td>
-    <td> Separator between parents, default is " &amp;gt; " </td>
-  </tr>
-</table>
-
-* **Future Development:** There are numerous development directions and specific features to consider. A couple of obvious possibilities:
-  * Rendering to formats other than tables: bullet lists, formatted body text;
-  * Specifying templates to be used for rendering.
-
--- [[JohnTalintyre]] - 29 Aug 2001 <br />
+#### <a name="Merged_into_TWikiMetaData_this_t"> </a> Merged into [[TWikiMetaData]] - this topic to be rolled back.