1. A method of accessing content in a travel management system, the method comprising: receiving a request from an application to access a standard data element and a non-standard data element from an extended record data structure, the request including predefined access criteria for arranging data elements in a response to the request; generating filtering rules based on the predefined access criteria in the request; transforming a first structure description file describing a structure of a plurality of attributes of a first data container associated with the non-standard data element based upon a predefined mapping scheme into a second structure description file; filtering the attributes of the first data container based at least in part upon applying the filtering rules to the second structure description file in order to generate filtered attributes; and generating an abstract container that includes a filtered element comprising the filtered attributes of the non-standard data element, wherein the standard data element is obtained from a global distribution system operating as the travel management system and the non-standard data element is obtained from a source other than the global distribution system.