NPCL Topic Map Ontology

NPCL Meta Types
Constraint Topics

A set of NPCL types and constraints can be represented in a topic map as a collection of topics, occurrences and associations. This feature enables a topic map to carry its own type and constraint information without the need to use any external files. It also enables the use of generic topic map editing and processing tools to create and update the type and constraint information for a topic map. This section describes how an NPCL schema can be represented in a topic map.

Note

Although we describe the NPCL representation in XML Topic Maps (XTM) syntax in this document, it is important to realize that most often you will be creating your schemas using either the NPCL XML Schema or using tools such as the Topic Map Editor - you will only very rarely need to create the XTM structures shown here yourself.