URI, URN e URL, una questione di definizioni : universal versus uniform

This article deals with the concepts of “Uniform Resource Indicator” (URI), “Uniform Resource Names” (URN), “Uniform Resource Characteristics” (URC) and “Uniform Resource Locator” (URL). Although it is not exhaustive because of the vastness of the topic, this article aims to offer a view on the topic to anyone who works and manages with remote electronic resources (RER) in their different aspects and different points of view. The analysed documents are: RFC Request for Comments (available in the IETF Internet Engineering Task Force’s website)and some drafts drawn up by the working groups within W3C The World Wide Web Consortium

Identification Schemes for Digital Resources

This paper discusses the various naming and addressing systems used to identify and locate resources in the digital environment. There are various schemes that have been developed for this purpose, like, URL, URN, URC schemes developed by the IETF (Internet Engineering Task Force), PURL developed at OCLC. The publishing industry also has developed the Digital Object Identifier (DOI), which is being used for rights management of intellectual property. The specifications and the working of URLs, URNs, PURLs, Handles and DOIs are discussed in detail in this paper

Towards persistent resource identification with the uniform resource name

The exponential growth of the Internet, and the subsequent reliance on the resources it connects, has exposed a clear need for an Internet identifier which remains accessible over time. Such identifiers have been dubbed persistent identifiers owing to the promise of reliability they imply. Persistent naming systems exist at present, however it is the resolution of these systems into what Kunze, (2003) calls persistent actionable identifiers which is the focus of this work. Actionable identifiers can be thought of as identifiers which are accessible in a simple fashion such as through a web browser or through a specific application. This thesis identifies the Uniform Resource Name (URN) as an appropriate identification scheme for persistent resource naming. Evaluation of current URN systems finds that no practical means of global URN resolution is currently available. Two ,new approaches to URN resolution, unique in their use of the Domain Name System (DNS) are introduced. The proposed designs are assessed according to their Usability, Security and Evolution and an implementation described for an example URN namespace of language identifiers

Naming and Addressing Conventions for Digital Resources

This paper discusses the various naming and addressing systems used to identify and locate resources in the digital environment. there are various schemes that have been developed for this purpose, like, URL, URN, URC schemes developed by the IETF (Internet Engineering Task Force), PURL developed at OCLC. The publishing industry also has developed the Digital Object Identifier (DOI), which is being used for rights management of intellectual property. The specifications and the working of URLs, URNs, URCs, PURLs, and DOIs are discussed in detail in this paper

IVOA Recommendation: IVOA Identifiers Version 1.12

An IVOA Identifier is a globally unique name for a resource. This name can be used to retrieve a unique description of the resource from an IVOA-compliant registry. This document describes the syntax for IVOA identifiers as well as how they are created. An IVOA identifier has two separable components that can appear in two equivalent formats: an XML-tagged form and a URI-compliant form. The syntax has been defined to encourage global-uniqueness naturally and to maximize the freedom of resource providers to control the character content of an identifier

Globally Distributed Object Identification for Biological Knowledge Bases

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 have become apparent, one of which is the inability to programmatically identify locally named objects that may be widely distributed over the network. This shortcoming limits our ability to integrate multiple knowledgebases, each of which gives partial information of a shared domain, as is commonly seen in bioinformatics. The Life Science Identifier (LSID) and LSID Resolution System (LSRS) provide simple and elegant solutions to this problem, based on the extension of existing internet technologies. LSID and LSRS are consistent with next-generation semantic web and semantic grid approaches. This article describes the syntax, operations, infrastructure compatibility considerations, use cases and potential future applications of LSID and LSRS. We see the adoption of these methods as important steps toward simpler, more elegant and more reliable integration of the world’s biological knowledgebases, and as facilitating stronger global collaboration in biology

Namespaces in XML 1.1

Los espacios de nombres XML proporcionan un método simple para calificar nombres de elementos y atributos utilizados en el Lenguaje Extensible de Marcado (Extensible Markup Language), asociándolos con espacios de nombres identificados mediante referencias IRI.Second editio

Recursively invoking Linnaeus: A Taxonomy for Naming Systems

Naming is a central element of a distributed or network system design. Appropriate design choices are central. This paper explores a taxonomy of naming systems, and engineering tradeoffs as an aid to the namespace designer. The three orthogonal components of the taxonomy are the characteristics of the namespace itself, name assignment, and name resolution. Within each of these, we explore a number of distinct characteristics. The position of this paper is that engineering design of naming systems should be informed by the possibilities and tradeoffs that those possibilities represent. The paper includes a review of a sampling of naming system designs that reflect different choices within the taxonomy and discussion about why those choices were made.This effort was sponsored by the Defense Advanced Research Projects Agency (DARPA) and Air Force Research Laboratory, Air Force Materiel Command, USAF, under agreement number F30602-00-2-0553