Embedding CCzero in image files - version 2.
Approach
0. Variables:
%name% name of creator (or, in this context, "publisher")
%uri% URI where creator can be contacted: a profile/contact web page or an email address
%title% title of the work - if any (IPTC "headline"is not the same??)
%country% "territory" where image is published, as applicable jurisdiction (if specified)
1. Creator
Someone has to place a work into the public domain. The CCzero tool uses terminology "publisher"; I'm assuming publisher here is equivalent with with creator (copyright holder).
=> This is / can be defined in [EXIF] Artist, [IPTC] By-line or [XMP] dc:creator
2. URI
%uri% is intended to be "[t]he URL where people can find more information about the work or the person using CC0."
=> In practice, this could be a URI: for instance either an email address, or a contact web page, as stored in [XMP] CreatorContactInfo; another option is the URL of a creator's profile page (which then preferably contains a way to contact the creator). A URL would be preferable to an email address, since a page (or contact form) can take changes in (email) address into account.
3. Country
What counts is "publication" (?), in practice this wil be the country where creator resides.
=> In practice (going on this assumption) this can be embedded in [XMP] CreatorContactInfo in the Country and CountryCode fields
5. Title
Going by IPTC Core guidelines this might be the file name of (original) scan or digital camera file.
Given that 1) such a name might not be unique (even for the photographer) and 2) we're not referring to a work, but embedding IN a work, the title loses some relevance. But, the actual *file* placed in Public Domain may not be the same as the original camera file.
=> A possible option is to embed the file name of the actual file to be placed in the public domain in that file (especially if it is NOT the original camera file). Two possible locations are [IPTC] Title and [IPTC] Keywords (as one of the keywords). The last is especially
useful when images are uploaded to webservices that create their own filenames / URIs for the
images: if a creator needs to be contacted, the original file name can be referenced, rather
than an arbitrary URI where the image may have been found.
5. Copyright statement
For embedding, this can not contain any (HTML) markup; link to creator's contact %url% can be replaced by creator's %name%; reference to %title% is redundant, especially if we already embed this (as applicable file name) elsewhere in the file.
Based on the sample HTML, the "Public Domain" copyright statement to be *embedded* then becomes:
"To the extent possible under law, %name% has waived all copyright and related or neighboring
rights to this work"
=> assign this to variable %copyright%
6. License URL
For CCzero this is always the same, regardless of whether a "territory" for jurisdiction has been defined:
http://creativecommons.org/publicdomain/zero/1.0/
=> assign this to variable %licurl%
Define values for replaceable variables
[%name%]
[%uri%]
- URL for Creator - e.g., a profile page: should contain a way to contact Creator; or
- Contact URL for Creator - should contain contact form, email and/or postal address; or
- email address for Creator (actually a URI)
[%title%]
- filename of actual image to be placed in the Public Domain (not necessarily original camera/ scanner file)
[%country%]
- country name where creator resides; or
- (if different) country where image is published and placed in Public Domain
[%copyright%]
- the derived copyright statement as defined in Approach
[%licurl%]
- the Creative Commons CCzero license url
Implementation
By image metadata standard (use ALL of these to keep maximum interoperability and consistency):
[EXIF]
- fill Artist with %name%
- fill Copyright with %copyright%
[IPTC IIM]
NOTE: There are length restrictions for all fields
- add "CC0 1.0" (or later version if/when that appears) to Keywords
- add %title% to Keywords
maximum length for each keyword is 64 characters
- fill By-line with %name%
maximum length is 32 characters - but see CopyrightNotice!
- fill CopyrightNotice with %copyright%
maximum length is 128 characters, which leaves only 20 for %name%! (shorten name or truncate?)
- fill Contact with %uri%
maximum length is 128 characters; for a URL a (reliable) URL-shortening service might be used if the full URL is too long
[XMP]
No length restictions like IPTC IIM has.
- fill Title with %title%
- fill (a) dc:creator with %name%
- fill dc:rights['x-default'] with %copyright% *)
- fill (a) dc:subject with "CC0 1.0" (or later version if/when that appears)
- fill (a) dc:subject with %title%
- fill a number of Iptc4xmpCore:CreatorContactInfo fields, at least:
- Iptc4xmpCore:CountryCode with country code matching %country%
- Iptc4xmpCore:CiAdrCtry with %country%
- Iptc4xmpCore:CiUrlWork with %uri% IF it actually is a URL (preferable), or
Iptc4xmpCore:CiEmailWork with %uri% IF it is an email address
- fill xmpRights:Marked with "False"
- fill xmpRights:UsageTerms with %copyright%
- fill cc:license with %licurl%
*) If/when CreativeCommons provides localized versions, these can be embedded in additional dc:rights elements
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Outstanding problem:
I see no way to *explicitly* tying a "territory" to the "Public Domain" notice like the "This work is published from" phrase does in the generated HTML; adding this to the copyright statement may be possible, but then this would be truncated in the IPTC CopyrightNotice anyway.
As before: comments and suggestions very welcome!
