Choice in ServiceLinks updates

[TuThoThai]

In continuation of Pull Request #194, an open discussion has risen about this specific part in SIRI-CA introduced in the PR. The question is about authorizing a choice in the XSD of SIRI-CA.

As of today, the choice reflect different implementations. Parties can either:

• change points (move one or several points),
• create a full new link

This is the extract from the XSD:

			<xsd:choice>
				<xsd:element name="ChangedPoints" type="ChangedPoints">
					<xsd:annotation>
						<xsd:documentation>List of modified points</xsd:documentation>
					</xsd:annotation>
				</xsd:element>
				<xsd:element name="UpdatedServiceLinks" type="ServiceLinkViewsStructure">
					<xsd:annotation>
						<xsd:documentation>List of SERVICE LINKs having updated shapes in that journey. This is only to provide updated the shapes of the journey (as gml:linestring), not to provide additional SERVICE LINK (provided through the sequence of CALLS)</xsd:documentation>
					</xsd:annotation>
				</xsd:element>
			</xsd:choice>

So, the question is: should the choice be removed and only one path chosen?