function
| Library: Markup utilities (OMMARKUPUTILITIES) Import : ommarkuputilities.xmd | Returns: the parsed entity value | 
export dynamic markup source function
   parse-entity  via value entity-resolver resolver
                from value string          uri
    
 The markup source function parse-entity is used to read and parse the entity value from its resolved
        URI. This function is usually applied to the URI returned by map-external-identifier. If the entity
        value cannot be read or its format is not recognized, parse-entity throws resolution-failure.
      
 The parse-entity function is dynamic. Its default implementation on the base entity-resolver type always throws resolution-failure, while its overriding on oasis.catalog-type assumes the entity is well-formed XML.