Page History

...

I came across this issue in the development of the unAPI HTTP service for Fedora. Rather than hardcode a datastream location in the WSDL binding, I extended the DSInputSpec schema to include an optional pid attribute. Absent the pid attribute, the datastream input is still assumed to belong to the data object. However, if the pid is specified, the binding occurs against the specified pid's datastream.

As shown in the diagram above, the data objects no longer include an XSL datastream. Instead, the XSL datastream is located in demo:cmodel and the DSINPUTSPEC datastream of demo:sdep references demo:cmodel.

sDep DSInputSpec
  <fbs:DSInput DSMax="1"DSMin="1"DSOrdinality="false"
               wsdlMsgPartName="XSL"pid="demo:cmodel">
  <fbs:DSInputLabel>XSL</fbs:DSInputLabel>
    <fbs:DSMIME>application/xml</fbs:DSMIME>
    <fbs:DSInputInstruction>DC to MODS XSLT</fbs:DSInputInstruction>
</fbs:DSInput>

sDep MethodMap

<fmm:MethodMap name="MethodMap - Document Transform SDEF Methods"
               xmlns:fmm="http://fedora.comm.nsdlib.org/service/methodmap">
  <fmm:Method operationName="transform"
              wsdlMsgName="transformRequest"
              wsdlMsgOutput="transformResponse">
    <fmm:DatastreamInputParm parmName="DC" passBy="URL_REF" required="true"/>
    <fmm:DatastreamInputParm parmName="XSL" passBy="URL_REF" required="true"/>
    <fmm:DefaultInputParm parmName="CLEAR_CACHE" passBy="VALUE" required="true"
                          defaultValue="yes" />
    <fmm:MethodReturnType wsdlMsgName="transformResponse"
                          wsdlMsgTOMIME="text/xml"/>
  </fmm:Method>
</fmm:MethodMap>

sDep DSInputSpec

<fbs:DSInputSpec xmlns:fbs="http://fedora.comm.nsdlib.org/service/bindspec"
                         label="Datastream Inputs">
  <fbs:DSInput DSMax="1" DSMin="1" DSOrdinality="false"
                       wsdlMsgPartName="DC">
    <fbs:DSInputLabel>Dublin Core</fbs:DSInputLabel>
    <fbs:DSMIME>text/xml</fbs:DSMIME>
    <fbs:DSInputInstruction>XML source to be transformed</fbs:DSInputInstruction>
  </fbs:DSInput>
  <fbs:DSInput DSMax="1" DSMin="1" DSOrdinality="false"
               wsdlMsgPartName="XSL" pid="demo:dc2mods.cmodel">
    <fbs:DSInputLabel>XSL</fbs:DSInputLabel>
    <fbs:DSMIME>application/xml</fbs:DSMIME>
    <fbs:DSInputInstruction>DC to MODS XSLT</fbs:DSInputInstruction>
  </fbs:DSInput>
</fbs:DSInputSpec>