The Sequencing OSID is an auxiliary service for sequencing Ids . Sequences may be externally applied to any OsidObject. An OsidObject may particpate in multiple sequences, or Chains, that can each be applied and accessed to different users or contexts.

Chains

A Chain is a set of Ids that can be sequenced.

Antimatroid Cataloging

Chains may be organized into federateable OsidCatalogs called Antimatroids.