[OASIS Issue Tracker] Commented: (ODATA-497) Make type prefix optional for URL literals

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    [ http://tools.oasis-open.org/issues/browse/ODATA-497?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=34646#action_34646 ] 

Ralf Handl commented on ODATA-497:
----------------------------------

Actually we could solve this by also omitting the single quotes for Guid, Date, TimeOfDay, and DateTimeOffset:

   $filter=StartDate ge 2013-09-02

   $filter=ChangedAt lt 2013-09-02T00:00Z

   $filter=EndTime lt 23:59

Their lexical patterns are different from both simple identifiers and each other

So we would require the prefix only for Binary, Enum, and Geo values, and unprefixed quotes for String values. Especially for DateTimeOffset values this is a vast improvement.

> Make type prefix optional for URL literals
> ------------------------------------------
>
>                 Key: ODATA-497
>                 URL: http://tools.oasis-open.org/issues/browse/ODATA-497
>             Project: OASIS Open Data Protocol (OData) TC
>          Issue Type: Improvement
>          Components: OData ABNF Construction Rules, OData URL Conventions 
>    Affects Versions: V4.0_CS
>         Environment: [Proposed]
>            Reporter: Ralf Handl
>             Fix For: V4.1_WD01
>
>
> Currently we require literals for e.g. Date and DateTimeOffset to be prefixed with a type identifier, e.g.
>    $filter=StartDate ge date'2013-09-02'
> In most cases the type of the literal can be deduced from the context, e.g. type of other comparison operand. 
> The only case in which this cannot be done is when comparing two literals, which is rare.
> So we can make the prefixes at least optional, or even completely get rid of them

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