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gbXML Schema Update - Version 8.01 (May 2025)
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Instructions for Using This Document
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We have incorporated a number of updates into the latest version of the gbXML schema: Version 8.01. These changes are listed in the "Change Log" tab (click below). You can add your own comments and suggestions about the latest schema under the "Comments" tab.
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1. gbXML was a big part of ASHRAE RP-1815, "Integrating Occupant Behavior Data into Building Information Modeling for Performance Simulation" that was completed in August 2024. The ASHRAE RP-1815 project centered on advancing the state of occupant behavior modeling as part of building information modeling (BIM) and energy modeling and simulation (BEM) workflows. Enhancements to the industry data standards IFC and gbXML for BIM and BEM to support occupant behavior modeling data were a specific area of focus and project deliverable. The research draws heavily on Lawrence Berkeley’s obXML occupant behavior modeling schema as an influence and point of departure for this work. Most of the obXML elements were incorporated into this new gbXML update.
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Comment due date: December 15, 2025
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Official Version 8.01 schema release date: January 15, 2026
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Thank you for your participation.
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Stephen Roth
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info@carmelsoft.com
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