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10.13.04
Introducing GRML
 By Toby J. Rhodes
Gordon Rhodes Markup Langauge, or GRML, is a markup language for web browsers. It has the data definition features of character-delimited files and XML, with the hyperlinking and form support of HTML.
The purpose of this article is to show why GRML exists and how it complements HTML, XML, RSS, and character-delimited formats.
Background
GRML is not the result of a specific plan. It was developed as a solution to another problem, namely reusing data from a web service. It began with the development of a web front-end to request content from a few web services. A data format was needed to handle responses. Having data in some arbitrary format was too limiting. Something formal was needed.
HTML and XML were considered, but they did not quite fit the front-end being developed. There needed to be another choice, one with...
support for multiple views (the front-end used a List control that has 4);
a way to define multiple sets of data for multidimensional views;
content that translates to/from other formats; and
a distinction between the display of the form and view.
Since there was no format that met all the requirements, the front-end was going to need something new. Using the front-end, it was possible to develop a format and test it for these requirements. In other words, the front-end existed before the markup language!
The format that resulted was GRML. It was designed to use forms and views, supports multiple and multidimensional views, works with existing web servers, and adapts to other formats. Once the markup language was finished, the web front-end became a web browser.
Now that the objective for GRML has been explained, the next step is to understand, in detail, why existing formats were not chosen.
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Understanding Markup Languages
Before going through the process of understanding why GRML is necessary, the existing formats need to be introduced and their design goals identified. The formats are considered from a data handling perspective, so no discussion of games, movies, music, advertising, and entertainment are mentioned.
For the purposes of creating a markup language, the two major features for browsing web pages are the form and view. A form contains any input control for user requests. A view displays content, or data from the web page without the markup tags or formatting elements.
Given the requirement of the form and view, it is possible to compare each format.
HTML is the most prevalent format on the web. It is designed for data display. There is form and view support.
XML is a minor format on the web. It is designed for data definition. It lacks form and view support.
RSS is a minor format on the web. It is designed for data definition. It lacks form support but has a view.
CSV or character-delimited formats are rarely used on the web. It is designed for data definition. It lacks form support but has a view.
Now that each format has been introduced, it is possible to understand the place for GRML on the web.
Let's begin with...
Read the Rest of The Article.
About the Author:
Developing with MFC for a couple of years now. Working at getting my new web browsers just right.
Take a look at GRMLBrowser.com.
Living in Memphis, TN and it is great coz there are absolutely no major sports teams (well, except for the Grizzlies). |
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