Semanticweb. Recipe. Outliner. Taxonomy import/export via XML. This module makes it possible to import and export vocabularies and taxonomy terms via XML, CSV, RDF and other formats.
If you want to just import a flat list of terms, or terms structured in various columns to represent heirarchy, Taxonomy CSV offers a number of CSV-style formats and the ability to just paste the list straight in. Try that for simpler jobs. CSV support in taxonomy_xml is limited to a specific (ISO 2788 - triples) format Work is currently being done in the Drupal 6 branch to extend support for remote services - online vocabulary, glossary, thesaurus and taxonomy resources - so libraries of structured terms can be imported directly.