The XML Abstract metdata handler should check for an existing value for multi-valued fields as well as simple text fields.
Similar metadata may be stored in multiple fields in the source and a developer may choose to map several source fields to the same tika field, in which case no check is made for duplicates of existing delimited values.
For example, a developer may want to dump any values contained in legacy IPTC keywords and dc:subject into tika keywords. If IPTC keywords = ['rock','tree','dog'] and dc:subject = ['rock','tree','K9'] then currently tika keywords = ['rock','tree','dog','rock','tree','K9'] instead of the desired ['rock','tree','dog','K9'].
|Status||Open [ 1 ]||Resolved [ 5 ]|
|Resolution||Fixed [ 1 ]|
|Transition||Time In Source Status||Execution Times||Last Executer||Last Execution Date|
|6d 20h 52m||1||Nick Burch||23/Jan/12 16:08|