1. A computer-implemented method of decomposing a set of schema files comprising: automatically identifying a plurality of root schema files in the set of schema files by making a list of all schema files in the set of schema files, and removing from the list each schema file included or imported by another schema file of the set of schema files, wherein a root schema file is determined based on remaining schema files in the set of schema files lacking a reference to that root schema file; and creating a subset for each identified root schema file, wherein each created subset contains the corresponding identified root schema file and at least one particular subset further includes one or more non-root schema files that indirectly provide information for a particular root schema file of the at least one particular subset.