.NET Persistence API: Difference between revisions

Revision as of 18:33, 28 September 2013

Revision as of 13:26, 21 November 2013

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The '''.NET Persistence API''', also referred to as '''NPA''', is a persistence and [[Objectobject-Relationalrelational Mapping|Object Relational Mappingmapping]] (ORM)]] specification for the [[.NET Framework|.NET framework]].<ref>http://www.npersistence.org/</ref>

NPA is based on the [[Java Persistence API|Java Persistence API]] (JPA)]], which is the standard persistence API in the [[Java (programming language)|Java]] world. NPA follows JPA by providing a complete persistence API and a rich set of ORM features.<ref>http://www.npersistence.org/faq</ref><ref>http://stackoverflow.com/questions/2756307/what-is-the-equivalent-of-jpa-in-net</ref>

== Motivation ==

The main purposes of the .NET Persistence API (NPA) are:<ref>http://www.npersistence.org/faq</ref>

* To provide a vendor -free persistence API for .NET, making switching from one persistence provider to another easier (avoiding [[vendor lock-in]]).

* To provide a cross -language persistence API by extending the popular [[Java Persistence API|Java Persistence API (JPA)]] to all the .NET programming languages.

== Technology ==

The main features of NPA include:<ref>http://www.npersistence.org/api-reference</ref><ref>http://nugetmusthaves.com/Package/NPersistence</ref>

* Object -oriented API for working against databases (usually RDBMS).

* Query language, based on SQL, for retrieving data from the database in an object oriented manner.

* Support of persisting [[Plain Old CLR Object|POCO (plain old CLR objects)]] objects (entities).

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** Using external XML - meta data is specified in external [[XML]] resource files.

== Implementations ==

NPA is a persistence specification. To use NPA an implementation of the specification is required.

Persistence and ORM vendors can provide their own implementations of NPA.

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== External links ==

* [http://www.npersistence.org/ www.npersistence.orgOfficial website]

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