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|  META TOPICPARENT  | 
 name="TWikiVariables"  | 
  
 MDREPO -- retrieve data from metadata repository  
-  Attention: This variable works only if MetadataRepository is in use. Otherwise, it always returns a zero length string.
  -  This retrieves data from the specified metadata repository table.
  -  Syntax: 
%MDREPO{ "table" ...}% (generic form), %MDREPO{ web="..." ...}% (web specific form)
  -  Parameters (generic form without 
web="..." parameter):                              |  Parameter  |       Description<-- -->    |       Default  |                       separator="..."  |       The separator string of records  |       "$n" (new line)  |                  filter="..."  |       The regular expression of record IDs to filter records. Matching is case-insensitive  |       none  |                  selection="..."  |       The record ID to be regarded as the selected. It affects how $marker in the format is evaluated.  |       none  |                  marker="..."  |       Text for $marker in the format if the item matches selection  |       "selected"  |                  "..."  |       Specify the table to retrieve  |       This or below is required  |                  format="..."  |       Format of one record. It may contain the following items. In addtion, the standard special tokens are handled accordingly.              |  Item  |  Description  |          $_ or $_()  |  the record ID  |          $__ or $__()  |   The record value in the following format:   FIELD_NAME=FIELD_VALUE FIELD_NAME=FIELD_VALUE ...  |          $marker or $marker()  |  Expands to marker for the item matching selection only  |          $_FILED_NAME or $_FIELD_NAME()  |  Please be noted that you need to put _ (underscore) in front of a field name. $_FIELD_NAME$ yields the value of the specified field. If the specified field does not exist in the record, it returns the null string ("").  |          ?FIELD_NAME?IF_FIELD_HAS_VALUE?  |  If the specified field has value and it's neither 0 nor the null string (""), it's evaluated as IF_FIELD_HAS_VALUE. Otherwise, it's evaluated as the null string. This is like q/.../ in Perl. A non-word character following ?FIELD_NAME becomes the terminator; i.e. you can write: ?FIELD_NAME:IF_TRUE:   Specifically, the following characters can be used as the delimiter: ! # % ' / : ? @  ^ ` | ~  = is excluded because it clashes with a parameter specification in a URL (?name=value).  |          ?!FIELD_NAME?IF_FIELD_HAS_NO_VALUE?  |  Similar to above but it's opposite. If the field has value, it's evaluated as the null string. Otherwise, it's evaluated as IF_FIELD_HAS_NO_VALUE.  |          $question  |  Replaced with ? after the ?FIEL_DNAME and ?!FIELD_ANME constructs are processed.  |            |       "| $_ | $__ |"  |                  exclude="..."  |       Comma separated list of record IDs to be excluded. You can use regular expression. If you specify Trash\d*, then Trash, Trash1, Trash2, ... are exluded but LightTrash and TrashBag are not excluded  |       none  |                  table="..."  |       (Alternative to above)  |       This or above is required  |             
  -  Example: 
%MDREPO{"webs" filter="^A" format="| $_ | $_admin | $_master |"}%        This would show the metadata of webs whose names start with A.
  -  Paramerers (web specific form):          
               |  Parameter  |       Description  |       Default  |                       web="..."  |       Specify the web. If it's a subweb, the corresponding top level web is specified  |       This is required  |                  "..."  |       Specify the format of the return value in the same manner as the format parameter in the generic form  |       $__  |                  default="..."  |       Specify the value to be returned when the specified or implied top level web does not exist in MDREPO  |       "" (null string)  |             
  -  Example: 
%MDREPO{web="Foo/Bar" "$_admin"}%        This would show the admin field of the Foo web.
  -  Category: AdministrationVariables, SystemInformationVariables
  -  Related: MetadataRepository
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