Question on the SMP identifiers

[<Adrien.FERIAL@ec.europa.eu>]

Dear BDXR technical committee,

We, at CEF eDelivery, have a question regarding the OASIS Service Metadata Publishing (SMP) Version 1.0 Committee Specification 03. It seems inconsistent with defining Identifiers' scheme emptiness.

The problem touches all 3 Identifiers used: ParticipantIdentifier, DocumentIdentifier, ProcessIdentifier – but we will focus on DocumentIdentifier to describe the issue clearly:

2.4.6 Document Identifier
2.4.6.1 Introduction
{rootNamespace}::{documentElementLocalName}[##{Subtype identifier}]

Where [ ] denotes an optional part of the identifier, and everything outside { } are string literals.

This implies that "rootNamespace" (which is called "scheme" in other places) is mandatory.

While few lines below:

 

2.4.6.2 XML Representation of Document Identifiers

Pseudo-scheme for DocumentIdentifier:

<DocumentIdentifier [scheme=xs:string]>xs:string</DocumentIdentifier>

 

This time "scheme" is defined as "optional".

 

We made some tests with official OASIS XSD, all these values pass XSD validation successfully:
<ParticipantIdentifier scheme="">string</ParticipantIdentifier>

<ParticipantIdentifier>string</ParticipantIdentifier>

<ParticipantIdentifier></ParticipantIdentifier>

<ParticipantIdentifier/>

 

There are 2 questions for which we need your help:

1.       Is "scheme" mandatory or not for each of 3 identifiers?

2.       If "scheme" is not mandatory, than what is their URL-representation?

::{IdentifierValue}
or this:
{IdentifierValue}

Best regards,

Adrien FERIAL

CEF eDelivery