[OASIS Issue Tracker] Created: (ODATA-485) Clarify that element notation of UrlRef expression can directly contain a literal string that is a URL

Clarify that element notation of UrlRef expression can directly contain a literal string that is a URL
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                 Key: ODATA-485
                 URL: http://tools.oasis-open.org/issues/browse/ODATA-485
             Project: OASIS Open Data Protocol (OData) TC
          Issue Type: Improvement
          Components: OData CSDL
    Affects Versions: V4.0_CS
         Environment: [Proposed]
            Reporter: Ralf Handl
             Fix For: V4.0_ERRATA01


The second sentence in section 14.5.15 Expression UrlRef states that

    The edm:UrlRef element MUST contain exactly one expression of type Edm.String. 

This caused questions whether the correct form is

    <UrlRef>http://some/url</UrlRef>

or

    <UrlRef><String>http://some/url<String></UrlRef>

Both forms are allowed and yield the same result, but the shorter first form is preferred

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