IVOA recommendation: Parameter Description Language Version 1.0
This work addresses interoperability issues for web services users, but it appears incremental as it builds on existing standards.
The paper tackles the problem of web services interoperability by defining the Parameter Description Language (PDL), which uses a rigorous data model, represented in XML, to describe parameters and constraints for self-descriptive web services.
This document discusses the definition of the Parameter Description Language (PDL). In this language parameters are described in a rigorous data model. With no loss of generality, we will represent this data model using XML. It intends to be a expressive language for self-descriptive web services exposing the semantic nature of input and output parameters, as well as all necessary complex constraints. PDL is a step forward towards true web services interoperability.