For SPListItem's built-in field values we have SPBuiltInFieldId class with many guids - SPBuiltInFieldId.Title and so on.
Now I am working with BCS and I can't find any built-in object for "BdcIdentity" field title for item fields in external lists. All the MSND's code-samples not so well-formed with hard-coded "BdcIdentity" string inside. So, should I cover it up in own const-static class or is there already built-in constant for that?