def build(self, builder):
        """Build XML object, return the root, this is a copy for consistency and testing"""
        params = dict(ODMVersion="1.3",
                      FileType=self.filetype,
                      CreationDateTime=self.creationdatetime,
                      Originator=self.originator,
                      FileOID=self.fileoid,
                      xmlns="http://www.cdisc.org/ns/odm/v1.3",
                      )
        if self.granularity_type:
            params['Granularity'] = self.granularity_type.value
        if self.source_system:
            params['SourceSystem'] = self.source_system

        if self.source_system_version:
            params['SourceSystemVersion'] = self.source_system_version
        params['xmlns:mdsol'] = "http://www.mdsol.com/ns/odm/metadata"

        if self.description:
            params['Description'] = self.description

        builder.start("ODM", params)

        # Ask the children
        if self.study is not None:
            self.study.build(builder)

        if self.clinical_data:
            for clinical_data in self.clinical_data:
                clinical_data.build(builder)

        if self.admindata is not None:
            self.admindata.build(builder)

        builder.end("ODM")
        return builder.close()
Build XML object, return the root, this is a copy for consistency and testing