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The Green Building
Green Building XML (gbXML)
Industry-specific XML-based standards Building engineering Building information modeling
The Green Building XML schema
An XML schema is a description of a type of XML document, typically expressed in terms of constraints on the structure and content of documents of that type, above and beyond the basic syntactical constraints imposed by XML itself. These constra ...
(gbXML) is an open
Open or OPEN may refer to:
Music
* Open (band), Australian pop/rock band
* The Open (band), English indie rock band
* ''Open'' (Blues Image album), 1969
* ''Open'' (Gotthard album), 1999
* ''Open'' (Cowboy Junkies album), 2001
* ''Open'' ( ...
schema developed to facilitate transfer of building data stored in Building Information Models (BIMs) to engineering analysis tools. It enables interoperability between BIM and building performance simulation
Building performance simulation (BPS) is the replication of aspects of building performance using a computer-based, mathematical model created on the basis of fundamental physical principles and sound engineering practice. The objective of buildin ...
, which is relevant to sustainable building design and operation. gbXML is being integrated into a range of Computer-aided design (CAD) software and engineering tools, supported by leading 3D BIM vendors. The streamlined workflow can transfer building properties to and from engineering analysis tools, which eliminates the duplicate model generation and allows a bidirectional information update.
gbXML is the underlying architecture of Autodesk
Autodesk, Inc. is an American multinational software corporation that makes software products and services for the architecture, engineering, construction, manufacturing, media, education, and entertainment industries. Autodesk is headquartere ...
's Green Building Studio commercial on-line energy analysis product, and is the main export option for energy analysis from their modeling products. It is often used for geometry data transformation, but the quality of exported models is not good. Lighting systems, Heating, Ventilation, and Air Conditioning (HVAC) systems and internal loads are often manually created by engineers in engineering analysis tools.
Architecture
gbXML is a hierarchy architecture made up of elements and attributes. Elements can have sub-elements, and attributes can help define the features of elements. Some attributes are necessary for building an element. For example, the gbXML tag, locating at the highest-level in the schema, must contain a campus element. Attributes of temperature unit and area unit are required to define the gbXML tag.Elements
Elements are components of a system. For example, Variable Air Volume (VAV) boxes are common components of a typical HVAC system. Defining a VAV box needs both the "HydronicLoop" tag and the "AirLoop" tag under the gbXML tag.Attributes
Attributes can help define the specialty of an element.See also
* Building information modeling (BIM) *Building performance simulation
Building performance simulation (BPS) is the replication of aspects of building performance using a computer-based, mathematical model created on the basis of fundamental physical principles and sound engineering practice. The objective of buildin ...
* Green building
Green building (also known as green construction or sustainable building) refers to both a structure and the application of processes that are environmentally responsible and resource-efficient throughout a building's life-cycle: from planni ...
* XML schema
An XML schema is a description of a type of XML document, typically expressed in terms of constraints on the structure and content of documents of that type, above and beyond the basic syntactical constraints imposed by XML itself. These constra ...
References
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Green Building XML (gbXML)
Industry-specific XML-based standards Building engineering Building information modeling