Editing Data model (section)

=== Object model ===
{{Main|Object model}}
An object model in computer science is a collection of objects or classes through which a program can examine and manipulate some specific parts of its world. In other words, the object-oriented interface to some service or system. Such an interface is said to be the ''object model of'' the represented service or system.  For example, the [[Document Object Model|Document Object Model (DOM)]] [http://www.w3.org/DOM/] is a collection of objects that represent a [[web page|page]] in a [[web browser]], used by [[scripting language|script]] programs to examine and dynamically change the page.  There is a [[Microsoft Excel]] object model<ref>[http://msdn2.microsoft.com/en-us/library/wss56bz7.aspx Excel Object Model Overview<!-- Bot generated title -->]</ref> for controlling Microsoft Excel from another program, and the [[ASCOM (standard)|ASCOM]] Telescope Driver<ref>{{cite web|url=http://ascom-standards.org/Standards/Requirements.htm |title=ASCOM General Requirements|date=2011-05-13 |access-date=2014-09-25}}</ref> is an object model for controlling an astronomical telescope.

In [[computing]] the term ''object model'' has a distinct second meaning of the general properties of [[object (computer science)|objects]] in a specific computer [[programming language]], technology, notation or [[methodology]] that uses them. For example, the ''[[Java (programming language)|Java]] object model'', the ''[[Component Object Model|COM]] object model'', or ''the object model of [[object-modeling technique|OMT]]''.  Such object models are usually defined using concepts such as [[class (computer science)|class]], [[message (computer science)|message]], [[inheritance (object-oriented programming)|inheritance]], [[polymorphism in object-oriented programming|polymorphism]], and [[information hiding|encapsulation]].  There is an extensive literature on formalized object models as a subset of the [[formal semantics of programming languages]].