The PID Meta Resolver is a generalized resolver for mapping items into records. The  PID Meta Resolver will know where to route different types of identifiers – e.g. DOI or URN:NBN. The PID Meta Resolver will improve machine based data processing and will allow getting digital object information without in-depth knowledge of the resolution mechanism of different PID systems. That enhances the compilation and analysis of data collections originating not only from different sources but also referenced by different PID systems.

N2T is an identifier scheme resolver that given a provided identifier, matches it to an identifier scheme definition. Depending on the form of the request, a successful match will either redirect to the registered target or present information about the matched definition.

EVELOPING A DOI RESOLVER

To resolve a Compact ARK (ie, an ARK beginning "ark:") it must initially be promoted to a Mapping ARK so that it becomes actionable. On the web, this means finding a suitable web Resolver Service to prepend to the compact form of the identifier in order to convert it to a URL (cf [CURIE]). (This is more or less true for any type of identifier not already in URL form.)

id string: the sequence of characters that is the identifier string itself, possibly modified by adding a well-known prefix (often starting with http://) in order to turn it into a URL. identifier: an association between an id string and a thing; e.g., an identifier “breaks” when the association breaks, but to act on an identifier requires its id string. actionable identifier: an identifier whose id string may be acted upon by widely available software systems such as web browsers; e.g., URLs are actionable identifiers.

These findings provide strong indicators that scholarly contentproviders reply to DOI requests differently, depending on the request method,the originating network environment, and institutional subscription levels