Artur Tomczak, Product Manager
buildingSMART Data Dictionary
Artur Tomczak, Product Manager
buildingSMART Data Dictionary
Title: „Digital support for circular building design”
Supervisors: Eilif Hjelseth, Ole Jonny Klakegg
Previously:
...online service for hosting data dictionaries:
classifications, properties and more*.
...provides meta-data to enrich BIM models
and assure their quality.
...allows linking between the content.
What is bSDD?
* also materials, relations, allowed values, units, definitions and translations.
...easy access to classifications/standards to enrich BIM models (e.g. Uniclass, ETIM, EPDs).
...checking BIM data for validity.
...extending IFC.
...providing references for IDS.
What is bSDD for?
ISO 12006-3:2022
— Framework for object-oriented information
ISO 23386:2020
— Methodology to describe, author and maintain properties in interconnected
data dictionaries
ISO 23387:2020
— Data templates for construction objects used in the life cycle of built assets — Concepts and principles
Related standards
Web of Data technologies
(Linked Data)
bSDD — data model
bSDD — data model
bSDD explainer — domains
bSDD explainer — classifications
bSDD explainer — properties
bSDD explainer — hierarchical sub-classes
bSDD explainer — connecting classes with properties
bSDD explainer — properties can restrict values
bSDD explainer — same for classification properties
bSDD explainer — there are multiple domains
bSDD explainer — domains can be connected
bSDD explainer — classification page
bSDD API
https://test.bsdd.buildingsmart.org/api/Domain/v3/Classifications?namespaceUri=https%3A%2F%2Fidentifier.buildingsmart.org%2Furi%2Fbs-agri%2Ffruitvegs-1.0&useNestedClassifications=truebSDD API
https://test.bsdd.buildingsmart.org/swagger/index.html
bSDD search page
https://test.bsdd.buildingsmart.org/graphiql/
bSDD GraphQL API
{
domain(namespaceUri : "http://identifier.buildingsmart.org/uri/sbe/swedishmaterials-1") {
namespaceUri
copyrightNotice
languageCode
classificationSearch(searchText: "asfaltbetong", languageCode: "sv-SE") {
name
namespaceUri
synonyms
relatedIfcEntityNames
properties {
name
isRequired
pattern
}
}
}
}bSDD GraphQL API
#1=IFCCLASSIFICATION($,$,$,'My Classification System',$,$,$);the 4th argument is the classification name, the other ones are optional.
You can read more in the docs: 📚 IfcClassification-Docs
Ifc ↔ bSDD — using the IfcClassification
#1=IFCCLASSIFICATION($,$,$,'My Classification System',$,$,$);
#2=IFCCLASSIFICATIONREFERENCE($,'My Wall Class',$,#1,$,$);Ifc ↔ bSDD — using the IfcClassification
To link with objects, a classification needs a Reference.
'123' is an ID.
'#1' points at the Classification.
You can read more in the docs:
#1=IFCCLASSIFICATION($,$,$,'My Classification System',$,$,$);
#2=IFCCLASSIFICATIONREFERENCE($,'My Wall Class',$,#1,$,$);
#3=IFCSLAB('0B...zH',$,$,$,$,$,$,$,$);Ifc ↔ bSDD — using the IfcClassification
Then, let's create a slab object.
To make it simpler, let's skip the geometry, but it is still a valid Ifc element.
You can read more about creating IfcSlab in the documentation:
#1=IFCCLASSIFICATION($,$,$,'My Classification System',$,$,$);
#2=IFCCLASSIFICATIONREFERENCE($,'My Wall Class',$,#1,$,$);
#3=IFCSLAB('0B...zH',$,$,$,$,$,$,$,$);
#4=IFCRELASSOCIATESCLASSIFICATION('2n...7J',$,$,$,(#3),#2);Ifc ↔ bSDD — using the IfcClassification
Then, let's connect the slab with the classification using RelAssociatesClassification.
You can read more about associating classification in the documentation:
Ifc ↔ bSDD — providing meaning to properties
The IfcProperty has the Specification attribute for:
URI reference to a location with semantic definition or informative text to explain the property.
and the URI of bSDD property is a great match for it.
#123 = IFCPROPERTY(
'Area',
'https://identifier.buildingsmart.org/
uri/buildingsmart/ifc-4.3/prop/Area',
IFCAREAMEASURE(21.37),
$
);source: ISO 22057:2022
— Data templates for the use of environmental product declarations (EPDs) for construction products in building information modelling (BIM)
Relationship between Data Dictionaries and sustainability standards
Artur Tomczak, Product Manager
buildingSMART Data Dictionary
bSDD intro
By Artur Tomczak
