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Please add your use case here: a method of using Yadis to accomplish various tasks, for the purpose of illustrating the many uses for Yadis.
Within XML-VCards -- the version of VCards we use for profile data representation in LID -- there's an element called PHOTO. I've seen people use this to point to a photo of themselves.
To get at it from a Yadis environment, do this:
1) take identity URL
2) determine whether it supports the LID Traversal Profile and the LID VCard profile, and from which URL (let's call that the LIDURL)
3) perform HTTP GET on LIDURL?xpath=/VCARD/PHOTO
I have gone through the steps to add relying party capabilities to my Wiki. I want to now use that to determine who can access information from an RSS feed from that Wiki site.