# Roundup Glossary

Version: | 1.5

class
  a definition of the properties and behaviour of a set of items
db (or hyperdb)
  a collection of items
designator
  a combined class + itemid reference to any item in the hyperdb
itemid
  a numeric reference to a particular item of one class
item
  a collection of data that forms one entry in the hyperdb.
property
  one element of data that makes up an item. In Roundup, item properties may be changed as needed - even after the tracker has been initialised and used in production.
schema
  the definition of all the classes that make up an tracker
tracker
  the schema and hyperdb that forms one issue tracker
tracker home
  the physical location on disk of a tracker

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