Semantic constraint based xml updating
One or more interrelated documents employing this grammar is called a topic map." The above standards are all recently proposed or defined as part of ISO/IEC 13250.As described below, there are also other, serialization formats such as LTM, As TMa= that have not been put forward as standards.Linear topic map notation (LTM) serves as a kind of shorthand for writing topic maps in plain text editors.This is useful for writing short personal topic maps or exchanging partial topic maps by email. There is another format called As TMa which serves a similar purpose.The data formats of XTM and LTM are similar to the W3C standards for RDF/XML or the older N3 notation.In normal use it is often desirable to have a way to arbitrarily query the data within a particular Topic Maps store.
There are different ways of notating topic maps graphically, in addition to GTM, listed below.
Features such as subject identifiers (URIs given to topics) and PSIs (published subject indicators) are used to control merging between differing taxonomies.
Scoping on names provides a way to organise the various names given to a particular topic by different sources.
Topic maps explicitly support the concept of merging of identity between multiple topics or topic maps.
Furthermore, because ontologies are topic maps themselves, they can also be merged thus allowing for the automated integration of information from diverse sources into a coherent new topic map.