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Issue 15.5 ('Touch Bar')
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FEATURE

Sharing Data for Health, Part 3

Exporting health data to XML

Issue: 15.5 (September/October 2017)
Author: JC Cruz
Author Bio: JC is a freelance writer based in British Columbia. He contributes regularly to MacTech Magazine and Dr Dobb's Journal. Away from the writing pile, JC spends quality time with his nephew, as a proper uncle should.
Article Description: No description available.
Article Length (in bytes): 44,427
Starting Page Number: 48
Article Number: 15506
Resource File(s):

Download Icon project15506.zip Updated: 2017-09-05 00:14:55

Related Link(s): None

Excerpt of article text...

I gave FooHealth the ability to export its health data, and I gave it the ability to import data as well. Now I face the challenge of adding XML support to both features. Today's article on data shall show how I export data to XML.

First, I extoll the benefits of supporting XML. I shall introduce the XML document object and explain the challenges in generating and processing such an object. I shall describe the key XML classes defined by Xojo. And I shall show how I assemble the document, then save it to an external file.

Readers need a working knowledge of Xojo, XML, and object-oriented design. An updated version of the FooHealth demo project (mk10.2) is available from the magazine's website.

The Beauty of XML

Since its first public appearance in 2008, XML (eXtensible Markup Language) has become the format of choice for many files, for many network protocols. It has strong support for the Unicode character set, it is portable, and it works well with complex data structures.

XML is similar to HTML in many ways. Both use markup tags to divide and organize their content. Both are network-friendly. And both require that user data be rendered first into text.

...End of Excerpt. Please purchase the magazine to read the full article.