Cause: XPath expressions relative to
each element selected by a {selector}are specified by {fields}. These XPath
expressions must identify a single node (element or attribute) whose content
or value was used in the constraint. This content or value must be of a simple
type.
Action: Remove duplicate elements or
attributes.

Relared Errors:
LSX-00295:
field element ~S is not a simple type
LSX-00300:
group must have name or ref but not both
LSX-00310:
local element or attribute should be namespace qualified
LSX-00311:
local element or attribute shouldn`t be namespace qualified
LSX-00320:
missing required elements in <all>
LSX-00330:
missing range start character
LSX-00331:
missing comma
LSX-00332: bad
decimal digits in a quantifier specification
LSX-00333:
literal ~S is not valid with respect to the pattern
LSX-00340:
improper namespace value for the imported element