How to handle include tag in xml schema

Question

My XML schema makes reference to other schema, something like:
<xsd:include schemaLocation="../LOCCommon/LOCCommon.xsd"/>
How do I handle this when using XML DB?

Answer 1

XDB does currently understand relative URLs. We are looking at this since thier use is becoming more common. You will need to register both schemas under absolute URLs and then adjust the URL of the include or import statement to reflect this...
The following code sample may help...
procedure fixRelativeURLs(xmlschema in out xmltype, schemaLocationHint varchar2)
as
  cursor getImports is
    select SCHEMA_LOCATION
      from xmlTable
             xmlnamespaces
               default 'http://www.w3.org/2001/XMLSchema'
             '/schema/import'
             passing xmlSchema
             columns
             SCHEMA_LOCATION varchar2(700) path '@schemaLocation'
  cursor getIncludes is
    select SCHEMA_LOCATION
      from xmlTable
             xmlnamespaces
               default 'http://www.w3.org/2001/XMLSchema'
             '/schema/include'
             passing xmlSchema
             columns
             SCHEMA_LOCATION varchar2(700) path '@schemaLocation'
  baseURL        varchar2(700);
  schemaLocation varchar2(700);
  targetURL      varchar2(700);
begin
  if instr(schemaLocationHint,'/',-1) > 0 then
    baseURL := substr(schemaLocationHint,1,instr(schemaLocationHint,'/',-1)-1);
  else
    baseURL := '/';
  end if;
  for import in getImports loop
    targetURL := baseURL;
    schemaLocation := import.SCHEMA_LOCATION;
    -- The following are treated as relative URLs
    -- URLs with no '/' character
    -- URLs which do not start with '/' and which do not contain '://'
    if ((instr(schemaLocation,'://') = 0) and (instr(schemaLocation,'/') <> 1)) then
      if (instr(schemaLocation,'..')  = 1 ) then
        while instr(schemaLocation,'..') = 1 loop
          schemaLocation := substr(schemaLocation,4);
          targetURL := substr(targetURL,1,instr(targetURL,'/',-1)-1);
        end loop;
      end if;
      schemaLocation := targetURL || '/' || schemaLocation;
      -- dbms_output.put_line('Import : re-mapping "' || import.SCHEMA_LOCATION || '" to "' || schemaLocation || '".');
      select updateXML
               xmlSchema,
               '/xsd:schema/xsd:import[@schemaLocation="' || import.SCHEMA_LOCATION || '"]/@schemaLocation',
               schemaLocation,
              NAMESPACES
      into xmlSchema
      from dual;
    else
      dbms_output.put_line('Import : skipping "' || import.SCHEMA_LOCATION || '".');
    end if;
  end loop;
  for include in getIncludes loop
    targetURL := baseURL;
    schemaLocation := include.SCHEMA_LOCATION;
    -- The following are treated as relative URLs
    -- URLs with no '/' character
    -- URLs which do not start with '/' and which do not contain '://'
    if ((instr(schemaLocation,'://') = 0) and (instr(schemaLocation,'/') <> 1)) then
      if (instr(schemaLocation,'..')  = 1 ) then
        while instr(schemaLocation,'..') = 1 loop
          schemaLocation := substr(schemaLocation,4);
          targetURL := substr(targetURL,1,instr(targetURL,'/',-1)-1);
        end loop;
      end if;
      schemaLocation := targetURL || '/' || schemaLocation;
      -- dbms_output.put_line('Include : re-mapping "' || include.SCHEMA_LOCATION || '" to "' || schemaLocation || '".');
      select updateXML
               xmlSchema,
               '/xsd:schema/xsd:include[@schemaLocation="' || include.SCHEMA_LOCATION || '"]/@schemaLocation',
               schemaLocation,
               NAMESPACES
        into xmlSchema
        from dual;
    else
      dbms_output.put_line('Inlcude : skipping "' || include.SCHEMA_LOCATION || '".');
    end if;
  end loop;
end;
--