Template Processor Language:-
A template processor (also known as a template engine or a template parser) is software or a software component that is designed to combine one or more templates with a data model to produce one or more result documents.For purposes of this article, a result document is any kind of formatted output, including documents, web pages, or source code, either in whole or in fragments.

System elements
All template processing systems consist of at least these primary elements:

* an associated data model;
* one or more source templates;
* a processor or template engine;
* generated output in the form of result documents.

Data model
This may be a relational database, a source file such as XML, an alternate format of flat file database, a spreadsheet or any of other various sources of preformatted data. Some template processing systems are limited in the types of data that can be used. Others are designed for maximum flexibility and allow many different types of data.

Source template
Source templates are traditionally specified:

* according to a pre-existing programming language;
* according to a specially-defined template language;
* according to the features of a hosting software application; or
* according to a hybrid combination of some or all of the above.