Using ART DECOR for Code Generation

ART DECOR is a framework for capturing medical information requirements, mostly for the exchange of data in healthcare. In a short series of articles we will explore the benefits ART DECOR offers for implementers. (See the ART DECOR Factsheet for a short general introduction, or art-decor.org for detailed documentation on ART DECOR.) ART DECOR captures the data needs of healthcare professionals and patients in datasets and scenarios. ART DECOR does not only help healthcare professionals and IT architects to model medical data, it also offers a wealth of goodies for implementers, some easier to find than others.

Take a look at one of our demos, Measurements by Patient. This page, the ProjectIndex gives access to most resources available for developers. Look for instance at the Vital Sign Result valueset from the Vital Signs Demo. It’s also available in XML and CSV, for easier importing into an application. But let’s look further, to the main transaction from the first demo, the Measurement Message. Most of the data needed for an application is in there: field names, data types, code lists, cardinality, help text (description). This data is also available as XML, and this is an ideal hook for code generation. This XML version of RetrieveTransaction contains even more in the <implementation> element, which contains an XML- or SQL-friendly name (shortName), as well as the HL7 datatype. RetrieveTransaction gathers all data from the dataset, transaction and valueSets, and combines those into a single view.

RT

There’s also detailed documentation for RetrieveTransaction. RetrieveTransaction thus contains almost everything that’s needed for code generation. In the example below, I’ve made a basic HTML code generator. This is just an example, if you wish to use is for real code generation, you will need to adapt it – only some datatypes are supported, the submit action doesn’t actually do anything etc. Later we’ll look at a more full-fledged code generator.

ToHtml

What is done here is just a simple XSL conversion from the RetrieveTransaction output to a HTML page. The XML tab contains the RetrieveTransaction output, the XSL tab the stylesheet which is the actual code generator, and the HTML tab the generated code. The Result tab shows the rendered HTML (it is a .png, since the HTML doesn’t render well in WordPress – here is the HTML Result page as HTML).

Result

Result

HTML

XSL

XML

As you can see, the actual XSLT to generate the HTML code is pretty small. A real HTML generator would need some more, but still needn’t be large. For a larger example, here is the generated HTML for the epSOS Patient Summary (due to IP issues, some Snomed codes are not included, so corresponding drop-downs will be empty).

In the second installment of this short series, we’ll take a further look at strategies for code generation with ART DECOR.

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