LSID

Life Science Identifiers are a way to name and locate pieces of information on the web. Essentially, an LSID is a unique identifier for some data, and the LSID protocol specifies a standard way to locate the data (as well as a standard way of describing that data). They are a little like DOIs used by many publishers.

An LSID is represented as a uniform resource name (URN) with the following format:

urn:lsid:⟨Authority⟩:⟨Namespace⟩:⟨ObjectID⟩[:⟨Version⟩]

The lsid: namespace, however, is not registered with the Internet Assigned Numbers Authority (IANA), and so these are not strictly URNs or URIs.

LSIDs may be resolved in URLs, e.g. http://zoobank.org/urn:lsid:zoobank.org:pub:CDC8D258-8F57-41DC-B560-247E17D3DC8C

Controversy over the use of LSIDs

There has been a lot of interest in LSIDs in both the bioinformatics and the biodiversity communities, with the latter continuing to use them as a way of identifying species in global catalogues. However, more recently, as understanding has increased of how HTTP URIs can perform a similar naming task, the use of LSIDs as identifiers has been criticized as violating the Web Architecture good practice of reusing existing URI schemes. Nevertheless, the explicit separation of data from metadata; specification of a method for discovering multiple locations for data-retrieval; and the ability to discover multiple independent sources of metadata for any identified thing were crucial parts of the LSID and its resolution specification that have not successfully been mimicked by an HTTP-only approach.

The World Wide Web provides a globally distributed communication framework that is essential for almost all scientific collaboration, including bioinformatics. However, several limits and inadequacies were thought to exist, one of which was the inability to programmatically identify locally named objects that may be widely distributed over the network.