Unified classification system for the construction industry in the UK, first published in 1997. It comprises 15 tables, coded A to Q, each of which represents a different type of construction information.

Each table can be used as a “standalone” table for the classification of a particular type of information. Terms from different tables can be combined to classify complex subjects. These 'legacy' Uniclass 1.4 tables can be seen on the CPIC site.

Uniclass 2 has been in development since 2012 and in 2014 was passed from the control of CPIC to the UK Government for development as part of the Technical Strategy Board project to produce a freely accessible “digital tool for building information modelling” for release in April 2015.