Saves a description and keywords to the IPTC data of a file. The following records are used: ◼PhotoShop_IPTC_Records/IPTC_PS_Caption ◼PhotoShop_IPTC_Records/IPTC_PS_Keywords
Note: ◼Specify the SKIP_DESCRIPTION const to avoid updating the description ◼Pass ssKeywords as nil to avoid updating the keywords