---
name: "XTM::base"
section: "3pm"
platform: "linux"
package: "libxtm-perl"
version: "0.37-1"
release: "Debian 4.0 (Etch)"
platforms: ["linux"]
url: "https://new.carta.tech/XTM::base"
---

# XTM::base(3pm)

Topic Map, base distribution

## NAME

XTM - Topic Map, base distribution

## SYNOPSIS

```
  use XTM;
  $tm = new XTM; # creating an empty map
```

```
  # reading a topic map description from an XML file
  use XTM::XML;
  $tm = new XTM (tie => new XTM::XML (file => 'mymap.tm'));
```

```
  # application specific persistent medium
  $tm = new XTM (tie => new XTM::Application::MineMineMine);
```

## DESCRIPTION

Topic Maps are a means for layering multidimensional topic spaces on top of information assets. The standard covers concepts like topics, associations, scopes and occurrences. Topic Maps are expected to have a major impact on future information systems and compete with RDF in the semantic web arena.

See http://www.topicmaps.org/xtm/1.0/ for more information.

Topic maps can be loaded from an XML based resource (local or remote via an URL) as prescribed by the XTM standard. There is also a way to tie a map to any persistent medium. The latter is especially interesting when running this module along with a (web) server.

## PROGRAMS

Following programs come with this distribution:

- xtm.pl

  A simple text interface to load & query topic maps locally.

- astma2xtm.pl

  An AsTMa= to XTM converter.

- prettifyxtm.pl

  A filter which formats any incoming XTM stream into a nested XML document.

## PACKAGES

Following packages come with this distribution:

- XTM

  toplevel wrapper for (non-threaded) maps

- XTM::Memory

  in-memory representation of a map

- XTM::PSI

  PSI definitions

- XTM::IO

  Abstract class

- XTM::AsTMa

  AsTMa adapter, this allows you to bind maps to an external AsTMa instance

- XTM::LTM

  LTM adapter, this allows you to bind maps to an external LTM instance

- XTM::XML

  XML adapter, this allows to to bind maps to an external XTM document

- XTM::XML::MemoryBuilder

  SAX filter to create in-memory representation of a TM

- XTM::Log

  logging facility will be used by others

- XTM::generic

  accessor functions for all below

- XTM::topic

  implementation of the 'topic' class

- XTM::association

  implementation of the 'association' class

- XTM::topicRef

  generic class definition

- XTM::baseName

  generic class definition

- XTM::scope

  generic class definition

- XTM::resourceRef

  generic class definition

- XTM::instanceOf

  generic class definition

- XTM::subjectIdentity

  generic class definition

- XTM::subjectIndicatorRef

  generic class definition

- XTM::variant

  generic class definition

- XTM::variantName

  generic class definition

- XTM::parameters

  generic class definition

- XTM::roleSpec

  generic class definition

- XTM::member

  generic class definition

- XTM::mergeMap

  generic class definition

- XTM::resourceData

  generic class definition

- XTM::baseNameString

  generic class definition

- XTM::occurrence

  generic class definition

## AUTHOR INFORMATION

Copyright 200\[1-25\], Robert Barta \<rho@telecoma.net\>, All rights reserved.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. http://www.perl.com/perl/misc/Artistic.html