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In software engineering, the data mapper pattern is an architectural pattern. It was named by Martin Fowler in his 2003 book Patterns of Enterprise Application Architecture . [ 1 ] The interface of an object conforming to this pattern would include functions such as Create, Read, Update, and Delete, that operate on objects that represent domain ...
A Network Computing Devices NCD-88k X terminal An X server runs on the X terminal, connecting to a central computer running an X display manager. In this example, client programs (xterm and xedit) are running on the same computer. In computing, an X terminal is a display/input terminal for X Window System client applications.
MKS X/Server, a commercial X server developed by MKS Inc., allows users to access Unix/Linux systems from a PC computers which run a Microsoft Windows operating system.The product offers both a full 32-bit X server and a native 64-bit X server (for x64 based systems) that operate on various versions of Microsoft Windows.
Laminas, framework that includes a table data gateway and row data gateway implementations; Qcodo, ORM and framework, open source; Redbean, ORM layer for PHP, for creating and maintaining tables on the fly, open source, BSD; Skipper, visualization tool and a code/schema generator for PHP ORM frameworks, commercial
In this example, the X server takes input from a keyboard and mouse and displays to a screen. A web browser and a terminal emulator run on the user's workstation, and a terminal emulator runs on a remote server but under the control of the user's machine. Note that the remote application runs just as it would locally.
All relevant data is assumed to exist solely on the remote server, and the X terminal user has no methods available to save or load data from a local peripheral device. Dedicated (hardware) X terminals have fallen out of use; a PC or modern thin client with an X server typically provides the same functionality at the same, or lower, cost.
The W3C introduced R2RML as a standard for mapping data in a relational database to data expressed in terms of the Resource Description Framework (RDF). In the future, tools based on semantic web languages such as RDF, the Web Ontology Language (OWL) and standardized metadata registry will make data mapping a more automatic process.
A client 'creates' a window by requesting that the server create a window. This is done via a call to an Xlib function that returns an identifier for the window, that is, a number. This identifier can then be used by the client for requesting other operations on the same window to the server. The identifiers are unique to the server.