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

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

LOCATION REGISTRATION NUMBER ASSIGNMENT CLASS (dexpi)

ClassOfClassOfDescription

A class to assign the location registration number value.

Classification

Classifier

RDF Properties

"A class to assign the location registration number value."
"LOCATION REGISTRATION NUMBER ASSIGNMENT CLASS"
"LOCATION REGISTRATION NUMBER ASSIGNMENT CLASS"

Namespaces

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