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Who is GMPG?
The Global Multimedia Protocols Group (GMPG) was founded in March 2003 by Tantek Çelik, Eric A. As of 2015, an analysis of the network of pages collected by Common Crawl found that the web host gmpg.org had the highest PageRank and third highest in-degree of all the hosts in the network.
What is ping back URL?
Essentially, a pingback is an XML-RPC request (not to be confused with an ICMP ping) sent from Site A to Site B, when an author of the blog at Site A writes a post that links to Site B. The request includes the URI of the linking page.
Why is there a link tag with REL ” profile “?
XFN is a HTML profile which describes the meaning of extra semantic data that can be added to the rel attribute of outbound links. If you specify relationship information in the link manager for the links you add then this describes the meaning of those attributes to a consumer of your site.
When to use REL Value Profile in HTML?
It is used to link to meta data profiles. In HTML5, the profile attribute was dropped. As an alternative to it, the rel value profile could be used (with several advantages over the profile attribute). RFC 6906 describes the ” profile Link Relation Type”.
When to use the profile line in HTML?
From my personal experience, I can tell you needn’t to use the profile line in order to have your metadata in use, but I do use the line as expected. XFN is a HTML profile which describes the meaning of extra semantic data that can be added to the rel attribute of outbound links.
What is the profile attribute in HTML 4.01?
In HTML 4.01, there is the profile attribute for the head element: This attribute specifies the location of one or more meta data profiles, separated by white space. For future extensions, user agents should consider the value to be a list even though this specification only considers the first URI to be significant.