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{{Two other uses| the P4 programming language|the perforce version control system|Perforce|other uses|P4}}
{{Infobox programming language
| name = P4
| paradigm = [[compiled language|compiled]], [[Domain-specific language|___domain-specific]], [[imperative programming|imperative]]
| year = {{start date and age|2013}}
| developer = [[The P4 Language Consortium|The P4 Language Consortium]]
| latest_release_version = version 1.0.2<ref>{{cite web|title=P4.org code |url=http://p4.org/spec.html |accessdate=7 April 2015}}</ref>
| latest_release_date = {{start date and age|df=yes|2015|02|17}}
| typing = [[strong typing|strong]], [[static typing|static]]
| license = [[Apache Licence|Apache]]-style
| website = {{URL|http://www.p4.org}}
| file_ext = .p4
}}
'''P4''' is a [[programming language]] designed to allow programming of packet forwarding dataplanes. In contrast to a general purpose language such as C or python, P4 is a [[___domain-specific language]] with a number of constructs optimized around network data forwarding. P4 is an [[open source|open-source]], [[Permissive free software licence|permissively-licenced]] language and is maintained by a non-profit organization called the P4 Language Consortium. The language was originally described in a SIGCOMM paper in 2014 titled “Programming Protocol-Independent Packet Processors”<ref>{{cite web|url=http://www.sigcomm.org/node/3503|title=P4: Programming Protocol-Independent Packet Processors|date=July 2014|accessdate=7 April 2015}}</ref> – the alliterative name shortens to “P4”.
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