About the HPXML Data Dictionary and the HPXML Transfer Standard
The HPXML Data Dictionary and the HPXML Transfer Standard are Building Performance Institute (BPI) data standards created to facilitate the exchange of information on building and energy performance in the residential energy efficiency industry.
The HPXML Data Dictionary provides a standard vocabulary of terms related to residential buildings, energy consumption, and energy conservation measures. The HPXML Transfer Standard provides a way to structure and communicate terms defined in the data dictionary between software systems.
Value of HPXML
HPXML enables access to the same, well understood terms and data structures that are used to collect and aggregate data, driving economies of scale in the administration, finance, and evaluation of residential energy efficiency programs. HPXML also enables the reuse of data and software for multiple purposes, which guards against software obsolesce and vendor lock-in, and boosts innovation in software development.
The HPXML Data Dictionary is aligned with other data standards including the Department of Energy’s Building Energy Data Exchange Specification and the Real Estate Standards Organization’s Data Dictionary to facilitate communication and the exchange of data with the real estate and building industries.
Residential energy efficiency programs that have adopted HPXML have been able to reduce internal and transactional costs, export data to the real estate industry, and provide evaluation consultants with a clean dataset. Programs have also been able to adopt off-the-shelf software solutions from developers that have coded to HPXML rather than build customized solutions, which saves time and money for stakeholders involved in program implementation.
HPC works with the Building Performance Institute (BPI), software developers, programs, government, and home performance contractors to develop and manage the data standards. HPC also hosts an HPXML website that has more detailed information on the value of HPXML, HPXML development and working group activities, case studies, and resources to help program administrators and software developers adopt and implement the data standards.
More information on HPXML can be found at www.HPXMLonline.com.