[OASIS Issue Tracker] (ODATA-1082) Add term Constraint to Validation vocabulary

[ https://issues.oasis-open.org/browse/ODATA-1082?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Pizzo updated ODATA-1082:
---------------------------------

    Proposal: 
Add new term

<Term Name="Constraint" 
           Type="Validation.ConstraintType" 
           AppliesTo="Property EntityType ComplexType">
    <Annotation Term="Core.Description" String="Condition that the annotation target has to fulfill" />
</Term>
<ComplexType Name="ConstraintType">
    <Property Name="FailureMessage" Type="Edm.String" Nullable="true">
        <Annotation Term="Core.IsLanguageDependent" />
    </Property>
    <Property Name="Condition" Type="Edm.Boolean" Nullable="false">
        <Annotation Term="Core.Description"
              String="Value MUST be a dynamic expression that evaluates to true if and only if the constraint is fulfilled" />
    </Property>
</ComplexType>

Example:

 <Annotation Term="Validation.Constraint" Qualifier="Comparison">
    <Record>
        <PropertyValue Property="FailureMessage" String="Start date cannot be after end date" />
        <PropertyValue Property="Condition">
            <Le>
                <Path>StartDate</Path>
                <Path>EndDate</Path>
            </Le>
        </PropertyValue>
    </Record>
</Annotation>



  was:
Add new term

<Term Name="Constraint" 
           Type="Validation.ConstraintType" 
           AppliesTo="Property EntityType ComplexType">
    <Annotation Term="Core.Description" String="Condition that the annotation target has to fulfill" />
</Term>
<ComplexType Name="ConstraintType">
    <Property Name="FailureMessage" Type="Edm.String" Nullable="true">
        <Annotation Term="Core.IsLanguageDependent" />
    </Property>
    <Property Name="Condition" Type="Edm.Boolean">
        <Annotation Term="Core.Description"
              String="Value MUST be a dynamic expression that evaluates to true if and only if the constraint is fulfilled" />
    </Property>
</ComplexType>

Example:

 <Annotation Term="Validation.Constraint" Qualifier="Comparison">
    <Record>
        <PropertyValue Property="FailureMessage" String="Start date cannot be after end date" />
        <PropertyValue Property="Condition">
            <Le>
                <Path>StartDate</Path>
                <Path>EndDate</Path>
            </Le>
        </PropertyValue>
    </Record>
</Annotation>




> Add term Constraint to Validation vocabulary
> --------------------------------------------
>
>                 Key: ODATA-1082
>                 URL: https://issues.oasis-open.org/browse/ODATA-1082
>             Project: OASIS Open Data Protocol (OData) TC
>          Issue Type: New Feature
>          Components: Vocabularies
>    Affects Versions: V4.0_CSD01
>         Environment: Proposed
>            Reporter: Ralf Handl
>             Fix For: V4.0_CSD02
>
>
> Communicating validation rules to the clients helps reduce the number of failed requests in API as well as UI scenarios.
> Besides the elementary rules Minimum, Maximum, Pattern, ... it would be helpful to allow expressing more complicated validation rules that involve logical and arithmetic expressions.



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