The IPTC metada of the original PXD document is contain only 2 editable data : Description and Keywords..
Posible to extend these ?
In the Pixelmator AppleScript Dict ... there are the full list of datas .. can i use it ?
properties (record, r/o) : All of this object's properties returned in a single record.
author (text)
author position (text)
caption (text) syn description
caption writer (text)
category (text)
city (text)
...