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Chapter 6. Understanding Metadata > What Is XMP, and Why Should I Care?

What Is XMP, and Why Should I Care?

XMP an Adobe initiative to promote a standard for metadata, but it's not a proprietary initiative. Instead, it's an open standard, it's documented, it's extensible, and it's even somewhat readable by humans. It is, in fact, a subset of XML (Extensible Markup Language), which is turn a subset of SGML (Standard Generalized Markup Language), the international standard metalanguage for text markup systems recorded in ISO 8879.

If you want to delve deeply into XMP, I suggest you start by looking at the available documentation. You can find several useful documents, including one on building custom File Info panels, at www.adobe.com:80/products/xmp/main.html. I'm not going to teach you how to write XML code in this chapter (it's a bit more difficult than writing actions, but a good bit easier than writing JavaScripts), but I will show you what XMP metadata looks like and show you some of the ways in which you can work with it.


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