Difference between revisions of "CC0 Technical Overview"
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| − | [[Category: | + | [[Category:CC0]] |
| − | + | __TOC__ | |
| − | + | [[CC0]] provides a framework that enables people to WAIVE all copyrights and related or neighboring interests that you have over a work. You can only do this if you hold [http://wiki.creativecommons.org/Before_Licensing#Make_sure_you_have_the_rights the necessary rights] for the work. | |
| − | + | This page describes the metadata used to describe CC0 works along with suggestions for publishers who wish to use CC0. | |
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| − | This page describes the metadata used to describe | ||
= Metadata = | = Metadata = | ||
| − | + | CC0 introduces two new predicates in the Creative Commons [http://creativecommons.org/ns namespace]. | |
| − | * ''' | + | * '''licenseOffer''': The URI or (as generated by the [http://labs.creativecommons.org/license/zero beta CC0 chooser]) blank node bundling the details of a license offer. A license offer can contain information regarding the specific license URI (<code>license</code>), the actor (<code>cc:waivedBy</code>, etc). |
* '''waivedBy''': The URI of the actor (rights holder) waiving all legal rights to a work. | * '''waivedBy''': The URI of the actor (rights holder) waiving all legal rights to a work. | ||
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== Examples == | == Examples == | ||
| − | The | + | The CC0 application returns HTML with [[RDFa|embedded metadata]] describing the role the user has selected, along with any additional metadata provided. |
=== Waiving Rights === | === Waiving Rights === | ||
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<pre> | <pre> | ||
| − | <p | + | <p xmlns:cc="http://creativecommons.org/ns#" |
| + | xmlns:dc="http://purl.org/dc/elements/1.1/" | ||
| + | rel="cc:licenseOffer"> | ||
<a rel="license" | <a rel="license" | ||
href="http://labs.creativecommons.org/licenses/zero/1.0/" style="text-decoration:none;"> | href="http://labs.creativecommons.org/licenses/zero/1.0/" style="text-decoration:none;"> | ||
| Line 34: | Line 34: | ||
href="http://labs.creativecommons.org/licenses/zero/1.0/">waived</a> | href="http://labs.creativecommons.org/licenses/zero/1.0/">waived</a> | ||
all copyright, moral rights, database rights, and any other rights that | all copyright, moral rights, database rights, and any other rights that | ||
| − | might be asserted over <a href="http://example. | + | might be asserted over <a href="http://example.org/~auser/brilliance"><span about="http://example.org/~auser/brilliance" property="dc:title">Brilliance Described</span></a>. |
| − | </pre> | + | </p></pre> |
Described in [http://en.wikipedia.org/wiki/Notation_3 N3], the triples encoded in the above HTML are: | Described in [http://en.wikipedia.org/wiki/Notation_3 N3], the triples encoded in the above HTML are: | ||
<pre> | <pre> | ||
| − | <http://example. | + | <http://example.org/~auser/brilliance> <http://creativecommons.org/ns#licenseOffer> _:n0 . |
| − | + | <http://example.org/~auser/brilliance> <http://purl.org/dc/elements/1.1/title> "Brilliance Described" . | |
| + | |||
| + | _:n0 <http://www.w3.org/1999/xhtml/vocab#license> <http://labs.creativecommons.org/licenses/zero/1.0/> . | ||
| + | _:n0 <http://creativecommons.org/ns#waivedBy> <http://example.com/~auser> . | ||
<http://example.com/~auser> <http://purl.org/dc/elements/1.1/title> "A. User" . | <http://example.com/~auser> <http://purl.org/dc/elements/1.1/title> "A. User" . | ||
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As you can see, this metadata makes statements about both the work and the person waiving their rights over the work. | As you can see, this metadata makes statements about both the work and the person waiving their rights over the work. | ||
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= Publishers = | = Publishers = | ||
| − | Creative Commons recommends marking works published under | + | Creative Commons recommends marking works published under CC0 with [[RDFa|embedded metadata]]. Metadata allows search engines and web software to find structured information about pages. The minimal recommended case is specifying CC0 as the license. Note CC0 is technically a waiver rather than a license but provides similar information regarding re-use rights. Therefore we reuse the existing, supported infrastructure. |
For example: | For example: | ||
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</pre> | </pre> | ||
| − | Additional metadata may be specified using the | + | Additional metadata may be specified using the <code>waivedBy</code> predicate, which specifies a URI; publishers are encouraged to provide additional metadata about the actor at that location. |
Latest revision as of 19:50, 15 April 2008
This article describes a DRAFT under discussion; contents, specifications and recommendations may change until the public discussion is complete.
CC0 provides a framework that enables people to WAIVE all copyrights and related or neighboring interests that you have over a work. You can only do this if you hold the necessary rights for the work.
This page describes the metadata used to describe CC0 works along with suggestions for publishers who wish to use CC0.
Metadata
CC0 introduces two new predicates in the Creative Commons namespace.
- licenseOffer: The URI or (as generated by the beta CC0 chooser) blank node bundling the details of a license offer. A license offer can contain information regarding the specific license URI (
license), the actor (cc:waivedBy, etc). - waivedBy: The URI of the actor (rights holder) waiving all legal rights to a work.
Examples
The CC0 application returns HTML with embedded metadata describing the role the user has selected, along with any additional metadata provided.
Waiving Rights
For example, a user waiving all rights to a work:
<p xmlns:cc="http://creativecommons.org/ns#"
xmlns:dc="http://purl.org/dc/elements/1.1/"
rel="cc:licenseOffer">
<a rel="license"
href="http://labs.creativecommons.org/licenses/zero/1.0/" style="text-decoration:none;">
<img src="http://labs.creativecommons.org/zero/images/88x31/cc-zero.png" border="0" alt="CC0" /></a>
<br/>To the extent possible under law, <a rel="cc:waivedBy" href="http://example.com/~auser">
<span about="http://example.com/~auser" property="dc:title">A. User</span></a> has <a rel="license"
href="http://labs.creativecommons.org/licenses/zero/1.0/">waived</a>
all copyright, moral rights, database rights, and any other rights that
might be asserted over <a href="http://example.org/~auser/brilliance"><span about="http://example.org/~auser/brilliance" property="dc:title">Brilliance Described</span></a>.
</p>
Described in N3, the triples encoded in the above HTML are:
<http://example.org/~auser/brilliance> <http://creativecommons.org/ns#licenseOffer> _:n0 . <http://example.org/~auser/brilliance> <http://purl.org/dc/elements/1.1/title> "Brilliance Described" . _:n0 <http://www.w3.org/1999/xhtml/vocab#license> <http://labs.creativecommons.org/licenses/zero/1.0/> . _:n0 <http://creativecommons.org/ns#waivedBy> <http://example.com/~auser> . <http://example.com/~auser> <http://purl.org/dc/elements/1.1/title> "A. User" .
As you can see, this metadata makes statements about both the work and the person waiving their rights over the work.
Publishers
Creative Commons recommends marking works published under CC0 with embedded metadata. Metadata allows search engines and web software to find structured information about pages. The minimal recommended case is specifying CC0 as the license. Note CC0 is technically a waiver rather than a license but provides similar information regarding re-use rights. Therefore we reuse the existing, supported infrastructure.
For example:
All legal rights to this page have <a rel="license" href="http://labs.creativecommons.org/licenses/zero/1.0/">been waived</a>.
Additional metadata may be specified using the waivedBy predicate, which specifies a URI; publishers are encouraged to provide additional metadata about the actor at that location.
