[Value] pattern-problem [Description] The text fails to match a pattern that defines allowable content (or matches one that defines non-allowable content). [Example] The tool disallows the regular expression pattern ['"”’][\.,] but the translated text contains "A leading “expert”, a political hack, claimed otherwise." A tool uses a regular expression to ensure that the content of an element is an IRI and flags what appears to be a malformed IRI. [Scope] S or T [Notes] 
Defining what is or is not an allowable pattern is up to the processing application and is beyond the scope of this specification. Best practice would be to use the Comment attribute to specify the pattern that led to the issue.