Detailed Description

comp SBMLNamespaces extension for the package.

This class of objects is defined by libSBML only and has no direct equivalent in terms of SBML components. This class is not prescribed by the SBML specifications, although it is used to implement features defined in SBML.

There is currently exactly one namespace defined for the Hierarchical Model Composition package: "http://www.sbml.org/sbml/level3/version1/comp/version1". Despite referencing SBML Level 3 Version 1 explicitly, this package (and all such packages) can be used without change in SBML Level 3 Version 2 documents. The only caveat is that features of the SBML Level 3 Version 2 specification that were not present in Level 1 may not be used by constructs from the Hierarchical Model Composition package. The most relevant restriction this implies is that if a Level 2 SBML element has an "id" attribute that was newly added in Level 2 (when "id" was added to SBase itself), an SBaseRef "idRef" attribute may not reference it, and it must continue to use the "metaIdRef" attribute instead.