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<link rel="unapi-server" type="application/xml" title="unAPI" href="http://www.example.org:8080/unapi/fedora" /> |
For the moment, I've just modified the viewObjectProfile.xslt (located in $FEDORA_HOME/server/access/) to include these two elements. As a result, the rendering of say, http://www.example.org:8080/fedora/get/demo:1, would now include those elements.
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In my prototype, I've added an XML datastream, UNAPI-FORMATS, to a content model object. This datastream describes the disseminations that should be considered an unAPI format. Originally, I intended to describe the formats in RDF, but at least for purposes of the prototype, I'm using JSON (wrapped with <json> tags so that I could have an inline XML datastream). For example:
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<json>
[["info:fedora/*/DC","oai_dc","text/xml","http://www.openarchives.org/OAI/2.0/oai_dc.xsd"],
["info:fedora/*/sdef:md/get?format=mods","mods","application/xml","http://www.loc.gov/standards/mods/"]]
</json>
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This is an array of arrays. Those familiar with the Resource Index circa Fedora 2.x might be familiar with the first array element, which we called a dissemination type. It is simply a dissemination URI where the PID of the object is replaced with a "*". The remaining elements correspond directly to the unAPI format elements. Again, this particular implementation was an expedient. A more Fedora-esque solution might employ an sDef & sDep to bind against a service that generated the JSON (or RDF) array.
Zotero Integration
Enabling automatic citation capture in Zotero typically involves the creation of a site translator. However, translators depend on regular expression matching against a site's URL, which doesn't work for the general case of supporting any Fedora based repository. Another approach would be to embed Zotero-supported metadata in disseminations, e.g. embedding COinS in HTML renderings of Fedora objects.
By far the most flexible approach appears to be exposing unAPI in Fedora.
DSpace Integration
As As a proof of concept, I implemented an OAI-PMH resolver, designed to provide unAPI services for any application that exposes OAI-PMH. As DSpace provides OAI-PMH, providing Zotero support only involved the additional steps of enabling the MODS crosswalk and adding the unAPI microformat identifier and unAPI service link to display-item.jsp.