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Mark-up to meet the different needs of a variety of devices - including mobile
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Conformance profiles which will specify exactly which HTML tags a given device
has to support
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Easier for developers to implement the features appropriate to a given device
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Two different devices will present things in the same way if (a) they belong
to the same conformance profile and (b) the document is within that profile
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The conformance profile will specify the HTML tags sets supported, style
sheet support, and also additional semantic contraints, (for example which
tags cannot be nested), and which data formats are supported, levels of scripting
support, and so on
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A Web document will be able to reference the conformance profile needed to
support its correct rendering
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Conformance profiles should greatly simplify matters when it comes to tuning
mark-up to match the needs of different devices.
The intention of the W3C:
To write Proposed Recommendations for conformance profiles for specific classes
of Web clients, for example, television and mobile access.
