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Directory Interchange Format (DIF) Writer's Guide, Version 7



Released: May 1999
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Table of Contents

About DIFs

What is a DIF?
Some Tips on Writing DIFs

Sample DIFs

Annotated DIF Template
A Sample DIF
A Sample Skinny DIF

DIF Fields

Directory Entry Identifier (required)
Directory Entry Title (required)
Data Set Citation
Personnel
Discipline
Parameters (required)
Keyword
Sensor Name
Source Name
Temporal Coverage
Paleo Temporal Coverage
Data Set Progress
Spatial Coverage
Location
Data Resolution
Project
Quality
Access Constraints
Use Constraints
Data Set Language
Originating Center
Data Center (Name, Dataset ID, Contact Personnel) (required)
Distribution
Multimedia Sample
Reference
Summary (required)
Related URL
Parent DIF
IDN Node
DIF Creation Date
Last DIF Revision Date
DIF Revision History
Future DIF Review Date

Appendix A: Valid Keyword Lists

Personnel Role Valids
Parameter Valids
Sensor Valids
Source Valids
Chronostratigraphic Unit Valids
Location Valids
Project Valids
Data Center Valids
Related URL Content Type Valids
IDN Node Valids

Appendix B: Suggested Keyword Lists

Data Presentation Form Keywords
Data Set Progress Keywords
Data Set Language Keywords
Distribution Media Keywords
Distribution Format Keywords
Multimedia Sample Format Keywords

Appendix C: Procedures Related to this Document

Procedure for Reporting Errors
Procedure for Suggesting Changes

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For information please contact:
Ron Vogel, Global Change Master Directory
vogel@gcmd.gsfc.nasa.gov


This document should be cited as:

Directory Interchange Format (DIF) Writer's Guide, Version 7. 1999. Global Change Master Directory. National Aeronautics and Space Administration. [http://gcmd.nasa.gov/difguide].


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