Summary: [RDF] "Cannot redeclare class arc2"
           Product: MediaWiki extensions
           Version: any
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: [other]


I just tried to install your RDFIO SMW-Extension according to but ran into
After adding ARC2 to the library of the SMW extension, the following error is
thrown when I try to access the wiki:
"Fatal error: Cannot redeclare class arc2 in
C:\[...]\mediawiki\extensions\SemanticMediaWiki\libs\arc\ARC2.php on line 17".

I am using SMW+ 1.5.1 (=windows, xampp), which already comes with quite some
extensions installed. The following (installed) extensions already seem to use
ARC (as they have an arc-folder in their library folder):
- HaloACL
- DataImport
- LinkedData
- SMWHalo

My suggestion: Maybe RDFIO should check whether ARC is already "loaded" before
loading it itself. I guess the above mentionned extensions have kind of such a
behavior (otherwise I an't explain why this error didn't occur earlier)...

I look forward to hearing from you and being able to use the RDFIO-Extension,
which sounds very nice!

Kind regards from Switzerland,

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