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periodic table

There are numerous scientific web services. Presented here is a sample of a periodic table web service. The service also supplies additional features for each element such as boiling point, atomic radius etc. which are not shown in the sample. This type of service could supply information into a chemistry site for formula calculations or more.

The Human Genome project has a public web site from which DNA data may be queried. There are numerous additional examples and your imagination can have no limits.

This is the more complex of these samples as the data must be extracted from an XML document using XPath and other techniques.

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