.NET Persistence API: Difference between revisions

Revision as of 14:07, 20 July 2012

Revision as of 23:26, 24 September 2012

Line 1:

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

NPA is based on the [[Java_Persistence_APIJava 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>

==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_APIJava Persistence API|Java Persistence API (JPA)]] to all the .NET programming languages.

==Technology==

Line 12:

* 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_ObjectPlain Old CLR Object|POCO (plain old CLR objects)]] objects (entities).

* Two methods for marking classes as entity classes and for specifying other settings:

** Using attributes - meta data is embedded in class definitions in the source code.

Line 30:

<!--- Categories --->

[[Category:.NET framework]]

[[Category:Object-relational mapping]]