In the Trackback linkback , the linking site is responsible to inform the linked site about the linking document.
When a new document is added or exising document is updated, the linking site should extracts all the links in the document. For each link it finds in document, the linking site should find the Trackback URL and send notification request to the linked site about the linking document.
The linking site should send standard HTTP POST request to Trackback URL. The request must contains a url field which should be the URL to the linking document. The request can contains some of the following fields:
If the linked site should response as described spec
The linked site can decide to ignore the request. For example:
There are 2 ways the linked site announce about its interest in Trackback notification for a document:
<link href="<document Trackback URL>" rel="trackback">
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/modul/trackback/"> <rdf:Description rdf:about="<document URL>" dc:identifier="<document URL>" dc:title="" trackback:ping="<document Trackback URL>" /> </rdf:RDF>
The linking site should download the linked document and extract the Trackback URL from it.