AttributeRegistry ValueName value pattern

Hi All,

I have a query about "ValueName" value pattern defined in AttributeRegistry_v1.xml. Is there any reason that pattern is defined as "^[A-Za-z][A-Za-z0-9_]+$". Our product has a resource is trying to apply this schema but only "ValueName" value can't meet this requirement. The value might contain white space or other special chars. Below I provided a example.


<Property Name="ValueName" Type="Edm.String">

<Annotation Term="OData.Permissions" EnumMember="OData.Permission/Read"/>

<Annotation Term="OData.Description" String="The value name of the attribute."/>

<Annotation Term="OData.LongDescription" String="The value of this property shall be a string representing the value name of the attribute. ValueName is a unique string within the list of possible values in the 'Value' array of a given attribute."/>

<Annotation Term="Validation.Pattern" String="^[A-Za-z][A-Za-z0-9_]+$"/>

</Property>

Example:
{
"ValueDisplayName": "128 Bytes",
"ValueName": "128 Bytes"
},
{
"ValueDisplayName": "Keep Link ON",
"ValueName": "Keep Link ON"
},
Please help to confirm. Thank you very much.



BR,
Caffrey