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Web Technology: Theory and Practice by M. Srinivasan

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8.4 HOW IT WORKS

An HTML or XHTML uses tags to describe the way content is to be displayed. It is recalled that, for instance, <h1> tag is used to display the content, within the start and end tags, as a top heading. XML is similar but it is obvious that tags may not be universally standard semantically. In the example shown in Figure 8.1, the tag “<to>”, is not a standard representation because it could mean differently in different contexts. It is left to the application to make sense out of it from a semantic perspective. The term Semantic refers to the meaning of the tags—programmatically it implies that appropriate actions should be defined.

Based on its broad framework of message structure, an XML may be specific to an application that ...

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