IP-XACT Working Group


To provide a well-defined XML Schema for meta-data that documents the characteristics of Intellectual Property (IP) required for the automation of the configuration and integration of IP blocks; and to define an Application Programming Interface (API) to make this meta-data directly accessible to automation tools. The technical committee's goals are:

  • To identify areas of improvement in current IP-XACT standard
  • To define standard for power analysis, early prototyping, AMS, verification, debug
  • To define the extensions aligned with committee member companies and EDA vendors
  • To encourage the world semiconductor community to enrich their designs with IP-XACT

Chair: Erwin de Kock, NXP

Vice Chairs: Jean-Michel Fernandez, Arteris

Current Status

In June 2023, the supplemental material for standard IEEE 1685-2022 IP-XACT was approved by Accellera. The supplemental material contains recommended vendor extensions to IEEE 1685-2022 that are available for download here.  These extensions support conditional elements for backward compatibility with IEEE 1685-2014. Conversion scripts from 1685-2014 to 1685-2022 are available for download here, as well as updated versions of the conversion scripts from 1685-2009 to 1685-2014. The conversion scripts support the recommended version extensions to IEEE 1685-2022. 

If you would like to report general technical issues pertaining to the extensions or conversion scripts directly to the working group, please post your feedback to the IP-XACT Community Forum. The IP-XACT WG will make every effort to properly assess and incorporate feedback received as it deems appropriate.


IEEE 1685, "Standard for IP-XACT, Standard Structure for Packaging, Integrating and Re-Using IP Within Tool-Flows," describes an XML Schema for meta-data documenting Intellectual Property (IP) used in the development, implementation and verification of electronic systems and an Application Programming Interface (API) to provide tool access to the meta-data. This schema provides a standard method to document IP that is compatible with automated integration techniques. The API provides a standard method for linking tools into a System Development framework, enabling a more flexible, optimized development environment. Tools compliant with this standard will be able to interpret, configure, integrate and manipulate IP blocks that comply with the proposed IP meta-data description. The standard will be independent of any specific design process. It does not cover the behavioral characteristics of the IP.


In July 2010, the IP-XACT Schema Working Group was formed by Accellera.

Prior to that, the SPIRIT Consortium had developed and specified the IP-XACT standard since 2003. During this time, several versions were released with an increasing range of features to address many aspects of expressing IP to allow tools to import and correctly integrate IP into designs. The many aspects addressed include register descriptions, interconnect, verification and the use of models. The SPIRIT Consortium submitted the IP-XACT specification in June 2009 to the IEEE-SA for industry approval, which successfully completed the balloting process by the end of the same year.

In June 2010, the IEEE 1685 IP-XACT standard became available for free download from the IEEE.

IEEE 1685 was developed within the IEEE Standards Association Corporate Program in which each participating member entity (such as corporations or other institutions) has one vote. This industry-oriented program often allows for standards creation in one to two years, depending on participant commitment and the use of IEEE support services. The program also provides a route to international acceptance for a standard based on the IEEE's broad ties to the international standards community.

The IP-XACT forms that are standardized include: components, systems, bus interfaces and connections, abstractions of those buses, and details of the components including address maps, register and field descriptions, and file set descriptions for use in automating design, verification, documentation, and use flows for electronic systems. A set of XML schemas of the form described by the World Wide Web Consortium (w3c) and a set of semantic consistency rules (SCRs) are included. A generator interface that is portable across tool environments is provided. The specified combination of methodology-independent meta-data and the tool-independent mechanism for accessing that data provides for portability of design data, design methodologies, and environment implementations.

Join this Working Group

If you are an employee of a member company and would like to join this working group, click here (requires login) and click Join Group.


  • Download legacy SPIRIT Example BusDefs
  • The XML Schema
  • Download SystemRDL 1.0
  • Leon2 example (.zip file 2.45 MB) - The Leon2 1685-2022 example is an IP-XACT processor design description, distributed to illustrate in a comprehensive manner many aspects of the IP-XACT standard such as component content and connections, bus interfaces, memory map and others.