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Searching Custom Aspects via CMIS

20110212 2 comments

I didn’t immediately see any simple, working examples of how to search custom aspect properties via CMIS so I’ll post a brief one here.

The Aspect

In this example we’re using a CMIS query to search for the IPTC caption property provided by the IPTC/EXIF project. After installing that module the properties are applied using an aspect which is defined in $ALFRESCO_HOME/WEB-INF/classes/alfresco/module/iptcexif/model/iptcModel.xml.

Within that file you’ll see:

    <aspects>
      <aspect name="iptc:iptc">

The Query

In our case the target Alfresco repository is running enterprise 3.3.1 and aspects are implemented via JOIN syntax as very briefly stated in the wiki.

So the resulting query for this particular search of the IPTC caption field ends up looking like:

SELECT D.*, IPTC.* FROM cmis:document AS D JOIN iptc:iptc AS IPTC ON D.cmis:objectId = IPTC.cmis:objectId WHERE IPTC.iptc:caption LIKE '%searchTerm%'

The Changes

There were big changes in Alfresco 3.4 in terms of metadata extraction and I haven’t yet had a chance to update the forge projects (or determine if they’re still even needed) and there are proposals for aspects in the next CMIS spec so I’ll be back to update this post.

Categories: Alfresco, CMIS Tags: , , ,