More Information About IPTC Metadata

In Aperture, you can import and export IPTC metadata for an image in an XMP sidecar file. XMP sidecar files are XML files that accompany each image containing IPTC and other metadata associated with the image. Any field containing information in the IPTC Core metadata view for a selected image version can be exported to the XMP sidecar file for that version. The IPTC Core metadata view is compliant with the IPTC Core specification version 1.0. For more information about choosing the IPTC Core metadata view, see Viewing and Changing Metadata in the Metadata Inspector and Inspector HUD. For more information about exporting XMP sidecar files, see Exporting Your Images. For more information about the IPTC Core specification version 1.0, go to

If you intend to export your keywords as IPTC metadata, make sure each keyword entry is no more than 64 characters long. Keyword entries longer than 64 characters may not be displayed properly in other IPTC editors or operating systems.

Here are some examples of common character limits for IPTC fields.

IPTC field and character limit
Description and example
Caption (2000 characters)
A long-form description of the subject and related information in a natural-language caption
Example: Mayor Alvarado addresses a crowd at the first soccer match of the season.
Keywords (64 characters)
A list of words describing the subject in discrete words or phrases
Example: Politician, Mayor, Futbol, Soccer, News, Game, Team, San Jose
Provider (32 characters)
Photographer’s name and/or agency name
Example: Matthew Birdsell/Sun Times News
Copyright (128 characters)
Copyright date, photographer’s name, agency name, and rights
Example: © 2009 Matthew Birdsell/Sun Times News. All rights reserved.
Title (64 characters)
A unique identifier, used by an agency or organization to catalog images
Example: mt52642j
Date Created (16 characters)
Date the image was created
Example: 05/16/2009
Image City (32 characters)
City where the image was captured
Example: San Jose
Image State/Province (32 characters)
Province or state where the image was captured
Example: California
Image Country (64 characters)
Country where the image was captured
Example: USA
Instructions (256 characters)
Applicable restrictions, rights, or embargo information
Creator (64 characters)
The image byline text
Example: © Matthew Birdsell/Sun Times News
Headline (256 characters)
The headline published with the image
Example: Mayor Alvarado Opens New Soccer Season in San Jose
Source (32 characters)
The source that provided the image
Example: Mercury News