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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 TYPICAL INFORMATION ASSIGNMENT CLASS (dexpi) to be used in DEXPI-compliant Proteus files starts with http - as shown below:

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

TYPICAL INFORMATION ASSIGNMENT CLASS (dexpi)

ClassOfClassOfDescription

Typical information about the PCE Request. Attribute of PCE Request

Classification

Classifier

RDF Properties

"Typical information about the PCE Request. Attribute of PCE Request "
"TYPICAL INFORMATION ASSIGNMENT CLASS"
"TYPICAL INFORMATION ASSIGNMENT CLASS"

Namespaces

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