ERIS and Magnet URI

One of the design goals of ERIS is interoperability with existing systems by the use of URIs. The ERIS specification defines its own URN format, but in practice this is hardly enough to make ERIS usable. This document presents some recomendations on how to embed and extend ERIS URNs by using Magnet URIs.

Magnet URI

Magnet URIs consist of a series of one or more parameters.

The most important parameter is xt (eXact Topic) which describes the content exactly. For ERIS encoded content the xt parameter should be set to the ERIS URN:


Further parameters can be used to attribute content with a human readable name (using the dn paramter) or an exact length (using the xl parameter):


See the Wikipedia page on Magnet URIs for other parameters.