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What kind of documentation do you provide, and in what formats?

For any study, there are several possible types of documentation files for data collections:

Our standard for documentation is Portable Document Format (PDF), and we are moving toward compliance with the PDF/A standard. The PDF file format was developed by Adobe Systems Incorporated and can be accessed using PDF reader software, such as the Adobe Acrobat Reader.

Some older studies may have ASCII or Word-processed documentation, but those formats are being converted to PDF.