Simple IfcXML | Presentation Summary Phase1
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Transcript of Simple IfcXML | Presentation Summary Phase1
status of simple ifcXML developments
use of created specifications
decisions for optimizing ifcXML
next steps
simple ifcXML
buildingSMART Process & Product Rooms 16-OCT-2012 Thomas Liebich, Matthias Weise
Status of simple ifcXML developments
Overview of achieved results
• ifcXML4 published XML Schema definition (XSD) of IFC4 RC4, automatically generated based on P28 configuration settings
• ifcXML4 for product libaries published first example for mapping of model view definitions, automatically generated based on use case specific P28 configuration settings
• ifcXML4 specification methodology published detailed documentation of P28 config settings for entire schema and possiblities for use case specific optimizations
http://www.buildingsmart-tech.org/specifications/ifcxml-releases/ifcxml4-release
http://www.buildingsmart-tech.org/specifications/ifcxml-releases/simple-ifcxml
simple ifcXML - Thomas Liebich / Matthias Weise - 2012
Use of created specifications
Use of P28 configuration settings 1) Schema mapping
simple ifcXML - Thomas Liebich / Matthias Weise - 2012
toolbox IFC4.exp
ifcXML4_config.xml
IFC4.xsd
IFC schema specified in EXPRESS
(ISO 10303 P11)
IFC schema specified in XML schema
(W3C)
Configured XML schema binding (ISO 10303 P28)
Use of created specifications
Use of P28 configuration settings 2) Data mapping
simple ifcXML - Thomas Liebich / Matthias Weise - 2012
toolbox *.ifc
ifcXML4_config.xml
*.ifcxml
IFC data stored in STEP physical file format
(ISO 10303 P21)
IFC data stored in ifcXML file format
(W3C)
Configured XML schema binding (ISO 10303 P28)
IFC4.exp
IFC schema specified in EXPRESS
(ISO 10303 P11)
Use of created specifications
Use of ifcXML XSD 1. code generation for ifcXML implementation
enables to focus on implementation of business logic – ideal for quick solutions
simple ifcXML - Thomas Liebich / Matthias Weise - 2012
IDE IFC4.xsd
*.ifcxml
IFC data stored in ifcXML file format
(W3C)
ifcXML tool
e.g. Eclipse Modeling Framework,
Altova XML Spy, …
tool with ifcxml import and export
functionality IFC schema
specified in XML schema (W3C)
simple ifcXML for IFC4
fully based on international standards IFC4 = ISO 16739 = data model standard
ISO 10303-28 = mapping standards from EXPRESS to XSD/XML
simple ifcXML - Thomas Liebich / Matthias Weise - 2012
Entire IFC EXPRESS
model
ifcXML4 XSD model
ISO 10303-28 common ifcXML
configuration settings
Decisions for optimizing ifcXML
The beauty of less <tags> *.ifc format #36= IFCCARTESIANPOINT((0.,0.,0.));
*.ifcxml 2x3 format (with tags “Coordinates” and “IfcLengthMeasure”) <IfcCartesianPoint id="ID36"> <Coordinates ex:cType="list"> <IfcLengthMeasure pos="0">0.</IfcLengthMeasure> <IfcLengthMeasure pos="1">0.</IfcLengthMeasure> <IfcLengthMeasure pos="2">0.</IfcLengthMeasure> </Coordinates> </IfcCartesianPoint>
*.ifcxml 4 format (with attribute “Coordinates” and space separated values)
<IfcCartesianPoint id="ID36" Coordinates="0. 0. 0."/>
simple ifcXML - Thomas Liebich / Matthias Weise - 2012
ifcXML4 – revamping ifcXML for what it should be
simple ifcXML - Thomas Liebich / Matthias Weise - 2012
A single solid in ifcXML for IFC2x3 <IfcDirection id="i1308624497"> <DirectionRatios ex:cType="list"> <ex:double-wrapper>0.</ex:double-wrapper> <ex:double-wrapper>0.</ex:double-wrapper> <ex:double-wrapper>1.</ex:double-wrapper> </DirectionRatios> </IfcDirection> <IfcRectangleProfileDef id="i1308624493"> <ProfileType>area</ProfileType> <ProfileName>1m x 1m rectangle</ProfileName> <Position> <IfcAxis2Placement2D> <Location> <IfcCartesianPoint xsi:nil="true" ref="i1308624379"/> </Location> </IfcAxis2Placement2D> </Position> <XDim>1000.</XDim> <YDim>1000.</YDim> </IfcRectangleProfileDef>
50 XML elements = 100%
<IfcExtrudedAreaSolid id="i1922" Depth="2000."> <SweptArea xsi:type="IfcRectangleProfileDef" id="i1925" ProfileType="area" ProfileName´="1m x 1m rectangle" Xdim="1000." Ydim="1000." /> <Position xsi:type="IfcAxis2Placement3D" id="i1928"> <Location id="i1959" Coordinates="0. 0. 0."/> </Position> <ExtrudedDirection id="i1931" DirectionRatios="0. 0. 1."/> </IfcExtrudedAreaSolid>
7 XML elements = down to 14%
<IfcExtrudedAreaSolid id="i1308624490"> <SweptArea> <IfcRectangleProfileDef xsi:nil="true" ref="i1308624493"/> </SweptArea> <Position> <IfcAxis2Placement3D xsi:nil="true" ref="i1308624494"/> </Position> <ExtrudedDirection> <IfcDirection xsi:nil="true" ref="i1308624497"/> </ExtrudedDirection> <Depth>2000.</Depth> </IfcExtrudedAreaSolid> <IfcAxis2Placement3D id="i1308624494"> <Location> <IfcCartesianPoint xsi:nil="true" ref="i1308624433"/> </Location> </IfcAxis2Placement3D>
<IfcCartesianPoint id="i1308624379"> <Coordinates ex:cType="list"> <IfcLengthMeasure>0.</IfcLengthMeasure> <IfcLengthMeasure>0.</IfcLengthMeasure> </Coordinates> </IfcCartesianPoint> <IfcCartesianPoint id="i1308624433"> <Coordinates ex:cType="list"> <IfcLengthMeasure>0.</IfcLengthMeasure> <IfcLengthMeasure>0.</IfcLengthMeasure> <IfcLengthMeasure>0.</IfcLengthMeasure> </Coordinates> </IfcCartesianPoint>
Same single solid in ifcXML4
simple ifcXML for Model Views
in addition to producing the simple ifcXML4 for entire IFC4,
the project also delivers a method for MVD / ER specific simple ifcXML
simple ifcXML - Thomas Liebich / Matthias Weise - 2012
Entire IFC EXPRESS
model
IFC EXPRESS submodel
Simple ifcXML XSD
model
MVD ISO 10303-28 MVD specific configuration
settings
Prototyping of simple ifcXML for Model Views
use the MVD specification for Product Libraries for IFC4 collaborating with Norwegian led "Product Library" project
produced the formal MVD subset of IFC4, and MVD specific simple ifcXML4
DDS has prototyped a software solution – very excited about new possibilities
simple ifcXML - Thomas Liebich / Matthias Weise - 2012
simple ifcXML - Thomas Liebich / Matthias Weise - 2012
Comparison between entire and MVD specific ifcXML4
entire ifcXML4 MVD specific ifcXML4
Use case not specified (model server)
data exchange scenarios as defined in an IDM
EXPRESS base schema IFC4 schema IFC4 subschema, generated from MVD
Mapping to XML schema ifcXML4 configuration setting
Further specialized ifcXML4 configuration setting, mainly for inverse relationships
Data compatibility fixed to configuration setting
fixed to configuration setting, transformation to ifcXML4 needed
Next steps – phase 2 of simple ifcXML project
• Public review of configuration settings and created ifcXML XSD feedback requested from implementers and toolbox providers
• Provision of more ifcXML example files
• Make toolboxes ready to deal with P28 configuration settings request to the industry to provide mapping functionality between ifc and ifcxml work with toolbox vendors to help them supporting ifcXML4 (e.g. EPM technology)
• Agreements about simple ifcXML specification packages e.g. including EXPRESS subschema, configuration settings, simple ifcXML XSD + further documentation based on mvdXML
• More work on Model View Definitions ideally being derived from IDMs and configured with software implementers
simple ifcXML - Thomas Liebich / Matthias Weise - 2012