Michiels blog

Eclipse has support for XML Schema so you can develop and test your own schemas for free!

If you are new to XML Schema, the XML Schema tutorial from www.w3schools.com is a good starter to enter the world of XML Schema.

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This post will explain some of the unique conversion features of OmniMark, which is uptranslate and context translate (See the conversion scheme to have an overview of the different types of conversion).

An uptranslate makes it possible to create XML (or SGML) starting from structured data. And this structured data doesn’t have to be XML. While creating this XML it is sent to the parser.

A context translate goes even a step further, it’s a combination of an uptranslate followed by a downtranslate.

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Sometimes I experience that Unicode and UTF-8 are mentioned as if it is the same thing. Although there is a relationship they are not the same.

This post explains shortly this relationship and gives you some references if you are interested in this material (and every programmer should!).

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Unlike XSLT processors, OmniMark uses a streaming model to process XML/SGML.

A streaming model has advantages but it also has disadvantages. The XML flows from top to bottom. You can’t randomly access the XML tree in memory.

So how can you process an XML node in the beginning of a document if it depends on a node that hasn’t streamed yet or maybe never will come?

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Until now I only demonstrated examples where XML content is processed without suppressing the content.

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In one of my previous posts about the OmniMark conversion scheme I explained the different translate types at high level.

I will now demonstrate a simple OmniMark downtranslate example. In this example an XML document is converted to (X)HTML.

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The XSLT conversion scheme

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This is the famous “hello world” program for OmniMark.

Easy isn’t it?

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