DEMO: Marking up NSIDC data catalog with extensions

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For this demo, I will show how extensions can be used to mark up the NSIDC dataset catalog.
see also: extensions marked up page

Source Code Screen-shot

Above is first five datasets in the data catalog, a comparison be clicking "original page test reuslt" and "marked-up page test result" will show you that there are several crucial content are not only crawled, but also understood by the search engine.

Before marking upAfter marking up