Regarding Namespace @prefix lbd: <https://linkebuildingdata.org/LBD#>

[AJAY31797]

Hii,

I am a researcher in the area of Construction Management, and I was trying to understand how the IFCtoLBD converter works. Using the tool, I used a simple IFC file exported from Revit and converted it to LBD. The namespaces in the converted file looked like something below:
@Prefix owl: http://www.w3.org/2002/07/owl# .
@Prefix bot: https://w3id.org/bot# .
@Prefix ifc: https://standards.buildingsmart.org/IFC/DEV/IFC2x3/TC1/OWL# .
@Prefix xsd: http://www.w3.org/2001/XMLSchema# .
@Prefix rdfs: http://www.w3.org/2000/01/rdf-schema# .
@Prefix lbd: https://linkebuildingdata.org/LBD# .
@Prefix props: http://lbd.arch.rwth-aachen.de/props# .
@Prefix geo: http://www.opengis.net/ont/geosparql# .
@Prefix unit: http://qudt.org/vocab/unit/ .
@Prefix IFC4-PSD: https://www.linkedbuildingdata.net/IFC4-PSD# .
@Prefix smls: https://w3id.org/def/smls-owl# .
@Prefix rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns# .
@Prefix inst: https://www.ugent.be/myAwesomeFirstBIMProject# .
@Prefix fog: https://w3id.org/fog# .

On reading the namespaces, I could not figure out what @Prefix lbd: https://linkebuildingdata.org/LBD# is, i.e., which ontology is it? On clicking the link given in the brackets, it leads to nowhere. (it says the DNS address can not be found). As a lot of data in the converted file is represented using the lbd prefix, it became a bit difficult for me to understand this.
Could anyone please help? I want to know what exactly the lbd prefix points to and what all classes, properties etc. it has. Sorry, if it is a silly question. I am kind of new to this area, so trying to figure out the things. Thanks.

Best Regards,
Ajay

[jyrkioraskari]

Hi Ajay,
You are right. It is an oldaddress. I will figure out how this can be fixed.

J.