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indicates a "that the destination of that hyperlink is a license for the current page." whereas rel-ecolabel would indicate that the destination of that hyperlink is an ecolabel for a product, company or service listed on the page.

In this case I am uncertain if rel-license defines an authoritative source for license information. The difference with rel-ecolabel is that we would define an authoritative source at We'd do this because there are many ecolabels 300+ and very few display their information in a standardised way. That being said, we're not beholden to this approach.

This would need to have the option / ability to point to the issuing labels site as well. Or if want to become the source, it should have a simple an quick method of adding labels into the system that aren't listed .. eg. a lot of UK based certified labels are currently not on the site. Would there be a conflict if I wanted to point the URL at the label associations website instead of (asked for discussion purposes)

Label example: Vegan Society Trademark:

Ecolabel Schema

ecolabel entry @ eg:

ecolabel entry @ eg:

ecolabel ISO types eg:


The Dublin Core conformsTo term appears to already solve a more general problem of indicating conforming to any external label etc, not just ecolabels.

Re-using conformsTo is also better than minting a new rel term. conformsTo can be used in a wider set of situations that "ecolabel" in that it can be used to indicate non-ecological conformance to standards too. e.g. a web page can conform to HTML 4.01 Strict, or software could conform to "Certified for Windows Vista" or a toy could conform to a particular child safety standard.

As a poshformat inside the product description, e.g. inside an hProduct:

This product conforms to <a rel="conformsTo"

using RDFa:

 This product conforms to <a about="#product"
 xmlns:dc="" rel="dc:conformsTo"

These claims could be verified by the authority being linked to (in the case above by simply providing a link back from to the product:

as a poshformat on the certified-carbonfree page:

The <a href="" rev="conformsTo">Foo product conforms to certified carbonfree.</a>

as RDFa: by linking to it using an about attribute, a namespace URL declaration, and labeling it with rev="dc:conformsTo".

ecolabel-formats was last modified: Monday, July 27th, 2009