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Access Constraints


Definition
The <Access_Constraints> field allows the author to provide information about any constraints for accessing the data set.  This includes any special restrictions, legal prerequisites, limitations and/or warnings on obtaining the data set.  Some words that may be used in this field include: Public, In-house, Limited, Additional detailed instructions on how to access the data can be entered in this field.
 
Syntax

<Access_Constraints>text</Access_Constraints>

  • Multiple lines of text are permitted. Characters may be selected from the UTF-8 character set.
 
Usage
  • The <Access_Constraints> field is highly recommended and may not be repeated.
  • Text should be single spaced with blank lines separating paragraphs
 

Example

<Access_Constraints>Registration is required to access the data.</Access_Constraints>

 

This document should be cited as:
Directory Interchange Format (DIF) Writer's Guide, 2016.
Global Change Master Directory.
National Aeronautics and Space Administration.
[http://gcmd.nasa.gov/add/difguide/].

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