ISO 10303-239 Product Life Cycle Support (PLCS) specifies an information model that defines what information can be represented and exchanged to support a product through its life cycle. The information model is specified using the EXPRESS information modeling language. Because the information model defined by PLCS is a generic model supporting the whole life cycle of a product, its scope is wider than most applications, business processes, or single data exchanges. Consequently Data Exchange Specifications (DEXs) are developed by the OASIS Product Life Cycle Support (PLCS) Technical Committee members to support the usage of subsets of the model.

PLCS uses the standard DEX templates defined in Release 5.