Feature summary (what you would like to be able to do and where):

I would like to to provide mismatches on values that do not have an associated statement guid (http://www.wikidata.org/entity/statement/…), like rdfs:label or skos:altLabel values or to represent missing values.

Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):

The processing of uploaded mismatches fails, if no valid statement guid and property id was provided. To provide mismatches on labels and alternative labels or completely missing values it needs be possible to provide mismatch data with only the item id and property id or property IRI (in case of rdfs:label / skos:altLabel) instead of an statement id.

Benefits (why should this be implemented?):

This would allow to report errors in labels and alternative labels or missing values compared to other datasets.