Dynamic, hierarchical data exchange system

摘要: A computer system provides the ability to construct and edit a Data Definition File (DDF) containing hierarchically related elements of data, some which are dynamic in that they must execute order produce or retrieve data. client having knowledge DDF appropriate for its uses sends request server, contains can requested by client. The parameters used server customize resulting keyed data file client's purposes. Upon receipt request, copies into coupled memory, performs parameter substitutions, executes elements. process is repeated recursively all hierarchical structure, until no remain, then returned uses. may be derived from plurality sources, these sources combined manipulated using operations, including relational algebra structured query language, enabling joins merges between multiple formats. An Authoring System provided assists construction validation DDFs.