No action. The definition of endsync in the ODF schema equals that of endsync in the (informative) SMIL XSD schema. Both do not permit escaped IDs. However the SMIL prose states that they are possible, and the (normative) SMIL DTD allows them, since it defines endsync of type CDATA. Therefore, ODF has the same issue as the SMIL XSD schema. Because the inconsistency is also in the SMIL XSD schema, and because "escaped" IDs are not a concept of XML or XSD, it appears reasonable to style with the current definition.