Hypertext Application Language: Difference between revisions

Revision as of 21:53, 24 November 2024

Latest revision as of 12:48, 19 February 2025

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{{Short description|Proposed computer definition standard}}

'''Hypertext Application Language''' ('''HAL''') is a convention for defining [[hypermedia]] such as links to external [[web resource|resources]] within [[JSON]] or [[XML]] code. It is documented in an [[Internet Draft]] (a "work in progress"), with the latest version 11 published the 10th of October 2023. The standard was initially proposed in June 2012, specifically for use with JSON,<ref>{{cite web |last1=Kelly |first1=Mike |title=JSON Hypertext Application Language |url=https://tools.ietf.org/html/draft-kelly-json-hal-00 |publisher=IETF |accessdate=16 October 2018 |date=7 June 2012}}</ref>, and has since become available in two variations, JSON and XML. The two associated [[MIME]] types are application/hal+xml and application/hal+json.<ref>{{cite book|last1=Richardson|first1=Leonard|last2=Ruby|first2=Mike Amundsen; foreword by Sam|title=RESTful Web APIs|date=2013|publisher=O'Reilly|___location=Sebastopol, CA|isbn=978-1-4493-5806-8|edition=First|chapter=7}}</ref>

HAL was created to be simple to use and easily applicable across different [[___domain (software engineering)|domains]] by avoiding the need to impose any requirements on how the project be structured. Maintaining this minimal impact approach, HAL has enabled developers to create general-purpose [[library (computing)|libraries]] which can be incorporated on any [[API]] that uses HAL.{{Citation needed|reason=RFC4627 does not mention HAL|date=October 2018}}