Editing Topic map (section)

===Other formats===
Other proposed or standardized serialization formats include:
* [http://www.isotopicmaps.org/cxtm/ CXTM] – '''C'''anonical '''X'''ML '''T'''opic '''M'''aps format (canonicalization of topic maps)
* [http://www.isotopicmaps.org/ctm/ CTM] – a '''C'''ompact '''T'''opic '''M'''aps Notation (not based on XML)
* [http://www.isotopicmaps.org/gtm/ GTM] – a '''G'''raphical '''T'''opic '''M'''aps Notation

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, AsTMa= 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. The format can be converted to XTM.

There is another format called AsTMa which serves a similar purpose. When writing topic maps manually it is much more compact, but of course can be converted to XTM. Alternatively, it can be used directly with the [[Perl]] Module TM (which also supports LTM).

The data formats of XTM and LTM are similar to the W3C standards for RDF/XML or the older N3 notation.<ref name=Garshol/>