Assign fails to validate

Question

I am trying to copy a variable from a complex type to a global variable, and I am running into some problems. I am able to pick the variable I want correctly out of the Variable Picker, but the validation fails when I try to deploy it. If anyone can shed some light on this, I'd very much appreciate it. Thanks.
ERROR
[bpelc] [Error ORABPEL-10057]: invalid query
[bpelc] [Description]: in line 65 of "C:\workspace\test7\test7.bpel", query "/title" is invalid, because step 'title' is not valid..
[bpelc] [Potential fix]: Check the XML schema and make sure your query string is valid.
[bpelc] .
WSDL
<?xml version="1.0" ?>
- <definitions name="DocumentService" targetNamespace="optio" xmlns="http://schemas.xmlsoap.org/wsdl/" xmlns:plnk="http://schemas.xmlsoap.org/ws/2003/05/partner-link/" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:tns="optio" xmlns:xs="http://www.w3.org/2001/XMLSchema">
- <types>
- <schema targetNamespace="optio" xmlns="http://www.w3.org/2001/XMLSchema">
- <complexType name="Document">
- <sequence>
<element minOccurs="1" name="date" type="dateTime" />
<element minOccurs="1" name="total" type="integer" />
<element minOccurs="1" name="title" type="string" />
</sequence>
</complexType>
- <complexType name="DocumentArray">
- <sequence>
<element maxOccurs="unbounded" minOccurs="0" name="Document" type="tns:Document" />
</sequence>
</complexType>
</schema>
</types>
- <message name="DeleteDocumentIn">
<part name="documentIdentifier" type="xs:integer" />
</message>
- <message name="DeleteDocumentOut">
<part name="retval" type="xs:integer" />
</message>
- <message name="GetDocumentDetailIn">
<part name="documentIdentifier" type="xs:integer" />
</message>
- <message name="GetDocumentDetailOut">
<part name="retval" type="tns:Document" />
</message>
- <message name="UpdateDocumentStatusIn">
<part name="documentIdentifier" type="xs:integer" />
<part name="documentStatus" type="xs:string" />
</message>
- <message name="UpdateDocumentStatusOut">
<part name="retval" type="xs:integer" />
</message>
- <portType name="DocumentService">
+ <operation name="DeleteDocument" parameterOrder="documentIdentifier">
<input message="tns:DeleteDocumentIn" name="DeleteDocumentIn" />
<output message="tns:DeleteDocumentOut" name="DeleteDocumentOut" />
</operation>
- <operation name="GetDocumentDetail" parameterOrder="documentIdentifier">
<input message="tns:GetDocumentDetailIn" name="GetDocumentDetailIn" />
<output message="tns:GetDocumentDetailOut" name="GetDocumentDetailOut" />
</operation>
- <operation name="UpdateDocumentStatus" parameterOrder="documentIdentifier documentStatus">
<input message="tns:UpdateDocumentStatusIn" name="UpdateDocumentStatusIn" />
<output message="tns:UpdateDocumentStatusOut" name="UpdateDocumentStatusOut" />
</operation>
</portType>
- <plnk:partnerLinkType name="DocumentService">
- <plnk:role name="DocumentService">
<plnk:portType name="tns:DocumentService" />
</plnk:role>
</plnk:partnerLinkType>
- <binding name="DocumentService" type="tns:DocumentService">
<soap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http" />
- <operation name="DeleteDocument">
<soap:operation soapAction="DeleteDocument" style="rpc" />
- <input name="DeleteDocumentIn">
<soap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" use="encoded" />
</input>
- <output name="DeleteDocumentOut">
<soap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" use="encoded" />
</output>
</operation>
- <operation name="GetDocumentDetail">
<soap:operation soapAction="GetDocumentDetail" style="rpc" />
- <input name="GetDocumentDetailIn">
<soap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" use="encoded" />
</input>
- <output name="GetDocumentDetailOut">
<soap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" use="encoded" />
</output>
</operation>
- <operation name="UpdateDocumentStatus">
<soap:operation soapAction="UpdateDocumentStatus" style="rpc" />
- <input name="UpdateDocumentStatusIn">
<soap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" use="encoded" />
</input>
- <output name="UpdateDocumentStatusOut">
<soap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" use="encoded" />
</output>
</operation>
</binding>
- <service name="DocumentService">
- <port binding="tns:DocumentService" name="DocumentService">
<soap:address location="http://192.168.1.103:8507/soap/DocumentService" />
</port>
</service>
</definitions>
- <!-- Document was cached on Fri Sep 16 09:01:51 EDT 2005 by the Oracle BPEL Designer
-->
BPEL
<!-- test7 BPEL Process [Generated by the Oracle BPEL Designer] -->
<process name="test7" targetNamespace="http://acm.org/samples" suppressJoinFailure="yes" xmlns:tns="http://acm.org/samples" xmlns="http://schemas.xmlsoap.org/ws/2003/03/business-process/" xmlns:bpelx="http://schemas.oracle.com/bpel/extension" xmlns:ora="http://schemas.oracle.com/xpath/extension" xmlns:ns0="optio">
     <!-- ================================================================= -->
     <!-- PARTNERLINKS -->
     <!-- List of services participating in this BPEL process -->
     <!-- ================================================================= -->
     <partnerLinks>
          <!--
The 'client' role represents the requester of this service. It is
used for callback. The location and correlation information associated
with the client role are automatically set using WS-Addressing.
-->
          <partnerLink name="client" partnerLinkType="tns:test7" myRole="test7Provider" partnerRole="test7Requester"/>
          <partnerLink name="documentService" partnerLinkType="ns0:DocumentService" partnerRole="DocumentService"/>
     </partnerLinks>
     <!-- ================================================================= -->
     <!-- VARIABLES -->
     <!-- List of messages and XML documents used within this BPEL process -->
     <!-- ================================================================= -->
     <variables>
          <!-- Reference to the message passed as input during initiation -->
          <variable name="input" messageType="tns:test7RequestMessage"/>
          <!-- Reference to the message that will be sent back to the
requester during callback
-->
          <variable name="output" messageType="tns:test7ResponseMessage"/>
          <variable messageType="ns0:GetDocumentDetailIn" name="getDoc_in"/>
          <variable messageType="ns0:GetDocumentDetailOut" name="getdoc_results"/>
          <variable messageType="ns0:UpdateDocumentStatusIn" name="updatedocstatus_input"/>
          <variable messageType="ns0:UpdateDocumentStatusOut" name="updatedoc_output"/>
     </variables>
     <!-- ================================================================= -->
     <!-- ORCHESTRATION LOGIC -->
     <!-- Set of activities coordinating the flow of messages across the -->
     <!-- services integrated within this business process -->
     <!-- ================================================================= -->
     <sequence name="main">
          <!-- Receive input from requestor.
Note: This maps to operation defined in test7.wsdl
-->
          <receive name="receiveInput" partnerLink="client" portType="tns:test7" operation="initiate" variable="input" createInstance="yes"/>
          <!-- Asynchronous callback to the requester.
Note: the callback location and correlation id is transparently handled
using WS-addressing.
-->
          <scope name="scope-1">
               <bpeld:annotation xmlns:bpeld="http://schemas.oracle.com/bpel/eclipse/designer"><bpeld:meta map.label="getDocument"/></bpeld:annotation><sequence>
                    <assign name="assign-1">
                         <bpeld:annotation xmlns:bpeld="http://schemas.oracle.com/bpel/eclipse/designer"><bpeld:meta map.label="input2getdoc"/></bpeld:annotation><copy>
                              <from variable="input" part="payload" query="/tns:test7Request/tns:documentidentifier"></from>
                              <to variable="getDoc_in" part="documentIdentifier"/>
                         </copy>
                    </assign>
                    <invoke name="invoke-1" partnerLink="documentService" portType="ns0:DocumentService" operation="GetDocumentDetail" inputVariable="getDoc_in" outputVariable="getdoc_results"><bpeld:annotation xmlns:bpeld="http://schemas.oracle.com/bpel/eclipse/designer"><bpeld:meta map.label="invoke_getdocument"/></bpeld:annotation></invoke>
               </sequence>
          </scope>
          <scope name="scope-2">
               <bpeld:annotation xmlns:bpeld="http://schemas.oracle.com/bpel/eclipse/designer"><bpeld:meta map.label="updateDocumentStatus"/></bpeld:annotation><sequence>
                    <assign name="assign-2">
                         <bpeld:annotation xmlns:bpeld="http://schemas.oracle.com/bpel/eclipse/designer"><bpeld:meta map.label="getdoc2update"/></bpeld:annotation><copy>
                              <from variable="input" part="payload" query="/tns:test7Request/tns:documentidentifier"></from>
                              <to variable="updatedocstatus_input" part="documentIdentifier"/>
                         </copy>
                         <copy>
                              <from variable="getdoc_results" part="retval" query="/title"></from>
                              <to variable="updatedocstatus_input" part="documentStatus"/>
                         </copy>
                    </assign>
                    <invoke name="invoke-2" partnerLink="documentService" portType="ns0:DocumentService" operation="UpdateDocumentStatus" inputVariable="updatedocstatus_input" outputVariable="updatedoc_output"><bpeld:annotation xmlns:bpeld="http://schemas.oracle.com/bpel/eclipse/designer"><bpeld:meta map.label="invoke_updateDocument"/></bpeld:annotation></invoke>
               </sequence>
          </scope>
          <invoke name="callbackClient" partnerLink="client" portType="tns:test7Callback" operation="onResult" inputVariable="output"/>
     </sequence>
</process>

Answer 1

Ok, I got it fixed. I found this article: http://www.webvivant.com/fixing-InDesign-epub-2.html
"...As content.opf is just a plain text file, you can open it with your  favourite text editor. Make sure you use a text editor and not a word  processor - you want something that can save ordinary text files."
I opened the content.opf file in TextEdit and found the <dc:date/> empty as epubchecker suggested. I replaced it with this: <dc:date>2011-03</dc:date>
I opened my eBook file with Springy (http://www.springyarchiver.com) and replaced old content.opf with the newly saved file. Ran epubcheck again in Terminal and got these results.
No errors or warnings detected
Hope this helps someone in the future...