Mark-up is additional information that allows users to attach particular meaning to text in a document. In order to identify exactly how the mark-up is interpreted, there are different types of mark-up languages. One of them is the Standard Generalized Markup Language (SGML) which is designed to define meaning by using angle brackets ‘<>’. SGML requires a lot of effort to adopt, whereas XML (extensible Markup Language) is much more easy to introduce.
XML includes a series of tags comprising of ‘Elements’ and ‘Attributes’. Anchor tag ‘’ is one example.In this case, ‘’ is element and ‘href’ is attribute and attribute has its own value ‘http://www.city.ac.uk/’.
XML must be ‘Well-formed’ and ‘Valid’
XML has 2 requirements that must be met. These are well-formed and valid. First, in order to be well-formed XML document, there are some criteria that need to be met. Fore example all tags must be closed, organized hierarchically and derived from a single root element. Secondly, XML document must be structured according to declaration which is commonly set out in ‘Document Type Definition’ (DTD)
XML in Healthcare industry
XML plays an important role in Healthcare industry as there are needs to store and share huge amount of various kinds of data. Boumphrey and Harrison (2000) say that:
XML has taken the business world by storm, and has revolutionized their document management strategies. Although it is just beginning to appear on the radar screens of most health care executives, it is likely that it will have a similar effect on the healthcare industry.
Unlike HTML, one of the most significant aspects XML document has is that it offers us the information of content itself.
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