Feature of the Week: Content negotiation

Content negotiation helps to represent a resource at the same URL in different ways considering the capabilities of the requesting user agent. It allows user agents to choose between several representations of a resource by giving an appropriate MIME type in the HTTP-Accept-header.

Browsers typically accept MIME types of text/html to get some human readable representation. A semantic web application, though, might prefer to get a representation of the resource in RDF and thus accepts only application/rdf+xml. In BibSonomy we have added this behaviour to URLs representing particular resources - i.e., a single bookmark or publication reference (which may be represented by several posts). You can access this feature by prepending the /url/ and /bibtex/ URLs with the prefix "/uri/", e.g.,

http://www.bibsonomy.org/uri/url/d1bb7b3f6cafafa7b418f9f356ff2e83

or

http://www.bibsonomy.org/uri/bibtex/2b8b87c78e9e27a44aacde0402c642bff

Depending on the Accept-header of your user agent you get a redirect to the appropriate representation of those resources. You can read some more information on this in the BibSonomy help system.

Feature of the Week

As explained in the last feature of the week, BibSonomy allows users to structure the content via SUPERTAG <- SUBTAG relations. The built tag concepts are available for searching and navigation through our folksonomy system.  As seen in the figure above it is ease in handling, whereas each step is symbolized with a circle. Only choose “concepts” (step 1) as search option and type a tag which your are interested in (step 2). In the last step (step 3), you get resources and a visual presentation of your concept as hierarchy.  Miranda