David Lingren on "[Plugin: Media Library Assistant] mla mapping/display xmp metadata"

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as requested - see at the bottom of this post - i'm reposting this post here in the correct forum and have closed my original post as resolved. the original post - posted at the wrong location - can be found here: https://wordpress.org/support/topic/mla-mappingdisplay-xmp-metadata?replies=3
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hi there

i am struggling with the xmp meta data of my images.

i am able to mapp iptc and exif meta information in the "standard field mapping" section of the "IPTC & EXIF" mla settings page.
screenshot: http://www.biaggi.ch/iptcexifmapping.jpg

unfortunately i was not able to work with any of the xmp values. i have tried to map the xmp Creator field with all kind of combinations like:
Creator
creator
xmp.creator
xmp.Creator
XMP.Creator
xmp:creator
xmp:Creator
XMP:Creator
see screenshot: http://www.biaggi.ch/xmpmapping.jpg

in the documentation, there is the following mentioned in the xmp section: "MLA will copy appropriate values from the XMP data into the nine "PDF Document Information Dictionary" fields to populate them as often as possible." as it's not quite clear to me weather this belongs only to pdf or all kind of filetypes, i have also tried to use the following two methods, both without success as well:
dc.creator
dc.Creator

as i've also found a post in this forum about plugins removing meta information when adding watermarks to the image, i've double checked, that this is not the case for my situation: the image i'm using does have many xmp fields as it's visible on the meta information display page: http://regex.info/exif.cgi?dummy=on&imgurl=http%3A%2F%2Fwww.ptzo.ch%2Fwp-content%2Fuploads%2F2016%2F05%2F5B1C7548-1.jpg

additionally i am not able to use the "{+xmp:ALL_XMP+}" parameter in the [mla_gallery] shortcode as it's mentioned in the example provided in this forum on https://wordpress.org/support/topic/how-to-use-exif_read_data-and-all_iptc?replies=14 :
[mla_gallery columns=1 post_parent=all posts_per_page=10 mla_caption="{+iptc:ALL_IPTC+}
{+exif:ALL_EXIF+}
{+xmp:ALL_XMP+}"]

Well actually, none of the ALL-_XXX examples i've tested do work:
[mla_gallery columns=1 post_parent=all mla_caption="{+xmp:ALL_XMP+}"]
[mla_gallery columns=1 post_parent=all mla_caption="{+iptc:ALL_IPTC+}"]
[mla_gallery columns=1 post_parent=all mla_caption="{+exif:ALL_EXIF+}"]

what am i missing here?

thanks

silvio
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David Lingren
Member
Posted 1 day ago #

Thank you for your question and for all the details you have supplied, including the screen shot of your mapping rule. Mapping XMP data requires a few simple changes from the example you have provided.

As the "EXIF/Template Value" heading implies, you must use a Content Template to specify anything other than an EXIF value in the text box. For your Creator example, try something like:

template:([+xmp:Creator+])

The template: label denotes a Content Template. The xmp: prefix indicates an XMP value and Creator is one of the Document Information Dictionary fields that MLA populates.

You can use all the power of Content Templates to select from multiple data sources, e.g.:

template:([+xmp:Creator+]|[+pdf:Creator+]|[+exif:Creator+])

I am not sure why your "ALL_" examples are not working; they look fine to me. If you can post one or more links to some of your images I can look at them and try to reproduce your issue.

I hope that gets you better results working with XMP data. I am traveling for a few days and I can investigate further when I retu home. It would be great if you could re-post this topic in the MLA Support forum so all MLA users can benefit from it. Thanks!
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https://wordpress.org/plugins/media-library-assistant/