1.Open Archives Initiative – Protocol for Metadata Harvesting (OAI-PMH)
OAI-PMH is a protocol developed by the Open Archives Initiative. It is used to harvest the metadata descriptions of the records in an archive so that services can be built using metadata from many archives.(http://en.wikipedia.org/wiki/OAI-PMH)
Open Archives Initiative
2.Dublin Core Metadata Initiative (DCMI)
The Dublin Core Metadata Initiative (DCMI) is an organization dedicated to fostering the widespread adoption of interoperable metadata standards and promoting the development of specialized metadata vocabularies for describing resources to enable more intelligent resource discovery systems.
DCMI URL: http://dublincore.org/index.shtml
3.Digital Object Identifiers (DOI)
The Digital Object Identifier (DOI ) is an identification system for intellectual property in the digital environment. Developed by the International DOI Foundation on behalf of the publishing industry, its goals are to provide a framework for managing intellectual content, link customers with publishers, facilitate electronic commerce, and enable automated copyright management.
DOI URL: http://www.doi.org/
4.OpenURL
OpenURL is a standardized syntax for transferring meta-data. The data usually describes an article or a journal. In other words, it's just a way of organizing data in a URL and pointing it to a destination. (http://www.serialssolutions.com/alOURL02.asp)
The OpenURL standard is a protocol for interoperability between an information resource and a service component. The underlying concept of the OpenURL standard is that links should lead a user to appropriate resources. A link server (such as SFX) defines the context of the user. When the link server accepts an OpenURL as input, it offers the user a range of services: such as links to a licensed and/or free e-copies of the full-text, links to physical library holdings information, links to docdel/ILL services and a range of other services as defined and customized by the library.
NISO - The OpenURL Framework for Context-Sensitive Services
