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The URL (web address) shown by your browser starts with https because you visit this site using a secured connection. Note that the URI reference (identifier) of ISO 6708 OBJECT (dexpi) to be used in DEXPI-compliant Proteus files starts with http - as shown below:

http://sandbox.dexpi.org/rdl/Iso6708Object

ISO 6708 OBJECT (dexpi)

ClassOfInanimatePhysicalObject

A class of inanimate physical object conforming to ISO 6708.

Specialization

Subclass

Superclass

RDF Properties

"A class of inanimate physical object conforming to ISO 6708."
"ISO 6708 OBJECT"
"ISO 6708 OBJECT"

Namespaces

p2
http://rds.posccaesar.org/2008/02/OWL/ISO-15926-2_2003#
dexpi
http://sandbox.dexpi.org/rdl/
rdf
http://www.w3.org/1999/02/22-rdf-syntax-ns#
pca
http://data.posccaesar.org/rdl/
rdfs
http://www.w3.org/2000/01/rdf-schema#