google/digitalbuildings
Dec 2024 – Oct 2025
10 Months active
Languages Used
YAMLyamlLogPython
Technical Skills
Configuration ManagementData ModelingHVAC SystemsOntology ManagementOntology EngineeringDocumentation
ccquigley
PROFILE
Ccquigley
Over ten months, Chris Quigley engineered extensive HVAC ontology and data model enhancements for the google/digitalbuildings repository, focusing on scalable, accurate system modeling and monitoring. He expanded canonical entity types, integrated advanced telemetry and alarm points, and refined validation workflows to improve data quality and operational insight. Leveraging Python, YAML, and regular expressions, Chris introduced new control abstractions, sensor integrations, and unit validation logic, enabling more granular analytics and safer automation. His work demonstrated depth in configuration management, ontology engineering, and schema definition, resulting in a robust, maintainable platform that supports energy optimization, compliance, and reliable cross-system data exchange.
Overall Statistics
Feature vs Bugs
82%Features
Repository Contributions
60Total
Bugs
3
Commits
60
Features
14
Lines of code
15,118
Activity Months10
Your Network
21 people
Work History
October 2025
4 Commits • 1 Features
Oct 1, 2025Month: 2025-10 | Focused on expanding the HVAC ontology and solidifying unit data validation in google/digitalbuildings. Delivered an ontology expansion with new entity types, telemetry fields, and alarm types, plus description refinements for clarity and control. Also fixed a critical regex validation to correctly handle the .units suffix for new unit data types. These changes enhance data modeling, telemetry governance, and validation reliability, enabling safer, scalable building automation and faster feature iteration.
4 Commits • 1 Features
Oct 1, 2025Month: 2025-10 | Focused on expanding the HVAC ontology and solidifying unit data validation in google/digitalbuildings. Delivered an ontology expansion with new entity types, telemetry fields, and alarm types, plus description refinements for clarity and control. Also fixed a critical regex validation to correctly handle the .units suffix for new unit data types. These changes enhance data modeling, telemetry governance, and validation reliability, enabling safer, scalable building automation and faster feature iteration.
October 2025
September 2025
2 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary — focused on expanding HVAC modeling and improving validation hygiene in google/digitalbuildings. Delivered a new MAU_DFSS_DFVSC_DXDC_HTDC unit type and removed an obsolete validation log, directly enabling more accurate configurations, faster validation, and better traceability. These changes enhance business value by improving system configuration accuracy and reducing noise in logs, while strengthening domain modeling and version-control discipline.
September 2025
2 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary — focused on expanding HVAC modeling and improving validation hygiene in google/digitalbuildings. Delivered a new MAU_DFSS_DFVSC_DXDC_HTDC unit type and removed an obsolete validation log, directly enabling more accurate configurations, faster validation, and better traceability. These changes enhance business value by improving system configuration accuracy and reducing noise in logs, while strengthening domain modeling and version-control discipline.
August 2025
4 Commits • 1 Features
Aug 1, 2025August 2025 — Key deliverable: HVAC Ontology Expansion and Entity Type Definitions for google/digitalbuildings. Expanded HVAC ontology with canonical types and introduced new entity types for AHUs, FCUs, DX2SWC, SARC, and related components, including numerous data points and interfaces to improve modeling, monitoring, and interoperability. This work creates a scalable, interoperable foundation for analytics, automation, and cross-system data exchange. Bug fixes: No major bugs reported this month. Focus remained on feature delivery and data-point integration to strengthen ontology integrity. Impact and accomplishments: Significantly enhanced modeling fidelity and interoperability across HVAC systems, enabling richer analytics, improved monitoring, and more reliable cross-system data exchange. Lays groundwork for automation workflows and future integrations. Technologies/skills demonstrated: Ontology engineering and semantic modeling; domain-specific taxonomy expansion; data-point/interface design; version-controlled repository work; cross-team collaboration on HVAC domain definitions.
4 Commits • 1 Features
Aug 1, 2025August 2025 — Key deliverable: HVAC Ontology Expansion and Entity Type Definitions for google/digitalbuildings. Expanded HVAC ontology with canonical types and introduced new entity types for AHUs, FCUs, DX2SWC, SARC, and related components, including numerous data points and interfaces to improve modeling, monitoring, and interoperability. This work creates a scalable, interoperable foundation for analytics, automation, and cross-system data exchange. Bug fixes: No major bugs reported this month. Focus remained on feature delivery and data-point integration to strengthen ontology integrity. Impact and accomplishments: Significantly enhanced modeling fidelity and interoperability across HVAC systems, enabling richer analytics, improved monitoring, and more reliable cross-system data exchange. Lays groundwork for automation workflows and future integrations. Technologies/skills demonstrated: Ontology engineering and semantic modeling; domain-specific taxonomy expansion; data-point/interface design; version-controlled repository work; cross-team collaboration on HVAC domain definitions.
August 2025
July 2025
17 Commits • 3 Features
Jul 1, 2025July 2025 monthly summary focused on expanding modeling expressiveness and configurability of the HVAC platform. Delivered a core HVAC ontology refactor with general type enhancements, AHU/MAU expansion for complex configurations, and advanced monitoring/control abstractions to enable finer control (e.g., cooling setpoints and chiller operations). Enhanced telemetry/alarms coverage and naming consistency, enabling more reliable monitoring and faster issue detection. These changes directly improve business value by supporting multi-zone configurations, safer and more scalable configurations, and improved operational insights.
July 2025
17 Commits • 3 Features
Jul 1, 2025July 2025 monthly summary focused on expanding modeling expressiveness and configurability of the HVAC platform. Delivered a core HVAC ontology refactor with general type enhancements, AHU/MAU expansion for complex configurations, and advanced monitoring/control abstractions to enable finer control (e.g., cooling setpoints and chiller operations). Enhanced telemetry/alarms coverage and naming consistency, enabling more reliable monitoring and faster issue detection. These changes directly improve business value by supporting multi-zone configurations, safer and more scalable configurations, and improved operational insights.
June 2025
9 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for google/digitalbuildings: Focused on expanding the HVAC ontology to support ASHP integration, new FCU type, exhaust dampers and damper types, oxygen concentration control with telemetry updates, and sensor enhancements. A total of 9 commits were executed this month to introduce the new ASHP type, a new FCU type, additional fan types and fields, damper types and fields, and related telemetry adjustments, all aimed at enabling more accurate modeling, monitoring, and energy optimization. No major bugs were reported; the work laid the groundwork for downstream features and improved system reliability and data quality. Impact includes better energy management, safer and more controllable HVAC operations, and data-driven decision making across the platform.
9 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for google/digitalbuildings: Focused on expanding the HVAC ontology to support ASHP integration, new FCU type, exhaust dampers and damper types, oxygen concentration control with telemetry updates, and sensor enhancements. A total of 9 commits were executed this month to introduce the new ASHP type, a new FCU type, additional fan types and fields, damper types and fields, and related telemetry adjustments, all aimed at enabling more accurate modeling, monitoring, and energy optimization. No major bugs were reported; the work laid the groundwork for downstream features and improved system reliability and data quality. Impact includes better energy management, safer and more controllable HVAC operations, and data-driven decision making across the platform.
June 2025
May 2025
4 Commits • 1 Features
May 1, 2025May 2025 monthly summary for google/digitalbuildings: Expanded HVAC modeling with new ASHP/HWS entity types, added flowrate monitoring for HWS, and introduced HP12SWC-based capability for heat pump control; deprecated HP12SWC in favor of HP8SWC, renaming identifiers to reduce misconfiguration. Delivered across multiple commits with clear traceability. Focused on business value: broader device support, improved operational insight, and a cleaner API surface for future improvements.
May 2025
4 Commits • 1 Features
May 1, 2025May 2025 monthly summary for google/digitalbuildings: Expanded HVAC modeling with new ASHP/HWS entity types, added flowrate monitoring for HWS, and introduced HP12SWC-based capability for heat pump control; deprecated HP12SWC in favor of HP8SWC, renaming identifiers to reduce misconfiguration. Delivered across multiple commits with clear traceability. Focused on business value: broader device support, improved operational insight, and a cleaner API surface for future improvements.
April 2025
13 Commits • 3 Features
Apr 1, 2025April 2025 monthly accomplishments for google/digitalbuildings focused on advancing ontology-driven modeling and monitoring capabilities. Implemented freezer-related ontology enhancements with a dedicated CDPM entity type and differential pressure monitoring, expanded HVAC ontology with new ASHP/HWS/FCU entity types and associated alarms/telemetry, and introduced COCMAX multi-zone carbon monoxide control with telemetry for max concentration monitoring. These deliverables improve modeling fidelity, enable proactive condition monitoring, and strengthen safety/compliance across systems. Technologies demonstrated include ontology extensions, telemetry integration, alarm point design, and multi-zone control concepts.
13 Commits • 3 Features
Apr 1, 2025April 2025 monthly accomplishments for google/digitalbuildings focused on advancing ontology-driven modeling and monitoring capabilities. Implemented freezer-related ontology enhancements with a dedicated CDPM entity type and differential pressure monitoring, expanded HVAC ontology with new ASHP/HWS/FCU entity types and associated alarms/telemetry, and introduced COCMAX multi-zone carbon monoxide control with telemetry for max concentration monitoring. These deliverables improve modeling fidelity, enable proactive condition monitoring, and strengthen safety/compliance across systems. Technologies demonstrated include ontology extensions, telemetry integration, alarm point design, and multi-zone control concepts.
April 2025
March 2025
1 Commits • 1 Features
Mar 1, 2025March 2025 - google/digitalbuildings: Delivered Flowrate Unit Expansion to add a new flowrate unit 'us_gallons_per_hour' with a conversion multiplier in the units configuration. This enables more granular flow reporting and improves data consistency for analytics and downstream applications. No major bugs fixed this month; focused on extensibility, data quality, and empowering customers with richer measurement capabilities.
March 2025
1 Commits • 1 Features
Mar 1, 2025March 2025 - google/digitalbuildings: Delivered Flowrate Unit Expansion to add a new flowrate unit 'us_gallons_per_hour' with a conversion multiplier in the units configuration. This enables more granular flow reporting and improves data consistency for analytics and downstream applications. No major bugs fixed this month; focused on extensibility, data quality, and empowering customers with richer measurement capabilities.
January 2025
3 Commits • 1 Features
Jan 1, 20252025-01 monthly summary for google/digitalbuildings: Delivered HVAC entity model enhancements to improve visibility, fault detection, and energy optimization. Implemented a canonical AHU type, damper monitoring, humidity sensors, and dewpoint integration; refined damper status relationships in ABSTRACT.yaml; introduced discharge air dewpoint sensing and expanded dehumidifier points. These changes enable more accurate fault detection, operational insights, and energy-aware decision making for building HVAC deployments.
3 Commits • 1 Features
Jan 1, 20252025-01 monthly summary for google/digitalbuildings: Delivered HVAC entity model enhancements to improve visibility, fault detection, and energy optimization. Implemented a canonical AHU type, damper monitoring, humidity sensors, and dewpoint integration; refined damper status relationships in ABSTRACT.yaml; introduced discharge air dewpoint sensing and expanded dehumidifier points. These changes enable more accurate fault detection, operational insights, and energy-aware decision making for building HVAC deployments.
January 2025
December 2024
3 Commits • 1 Features
Dec 1, 2024Monthly summary for 2024-12 (google/digitalbuildings): Delivered HVAC data model enhancements to improve monitoring and control. Implemented flow rate requirements and command types for exhaust damper, enabled zone humidity monitoring in VAV/RP, and refined telemetry by adding a new sensor and removing unused entries to improve data collection and system visibility. These changes enhance data quality, fault detection, and energy management. No separate bug fixes were reported this month; focus was on feature delivery and telemetry stabilization. Core technologies demonstrated include data modeling, telemetry design, and cross-component integration (VAV/RP).
December 2024
3 Commits • 1 Features
Dec 1, 2024Monthly summary for 2024-12 (google/digitalbuildings): Delivered HVAC data model enhancements to improve monitoring and control. Implemented flow rate requirements and command types for exhaust damper, enabled zone humidity monitoring in VAV/RP, and refined telemetry by adding a new sensor and removing unused entries to improve data collection and system visibility. These changes enhance data quality, fault detection, and energy management. No separate bug fixes were reported this month; focus was on feature delivery and telemetry stabilization. Core technologies demonstrated include data modeling, telemetry design, and cross-component integration (VAV/RP).
Activity
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Quality Metrics
Correctness90.8%
Maintainability91.2%
Architecture90.8%
Performance85.8%
AI Usage20.4%
Skills & Technologies
Programming Languages
LogPythonYAMLyaml
Technical Skills
Configuration ManagementControl SystemsData ModelingData ValidationDocumentationHVAC SystemsHVAC systemsHVAC systems modelingOntology DevelopmentOntology EngineeringOntology ManagementRegular ExpressionsSchema DefinitionYAMLYAML Configuration
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