Questions

Asked Questions

Doesn't matter if they're "frequently asked" at this point - if you have a question, please add it to this page. We'll try to get an answer posted ASAP.

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Where Can I Find...?

PDS4 documentation

http://pds.nasa.gov/pds4/doc/index.shtml

This site lists the manuals and guides produced by PDS for PDS4 users. Here you'll find the Standards Reference, the Data Dictionary, the Information Model Specification, and a collection of tutorials and handbooks on various subjects. Be careful of version numbers while PDS4 is still in development!

PDS4 Schemas

http://pds.nasa.gov/pds4/schema/index.shtml

Here, too, be very careful of versions numbers...

PDS2010 Software

http://pds.nasa.gov/pds4/software/index.shtml

At the moment, the only thing posted is the validator, but watch this space.

Standard Value Lists for PDS4 keywords?

There are two places:

1. The Data Dictionary document. This is a contextual dictionary, in other words the standard value list will be dependent on what class the keyword appears in, and will be different for different classes. There's a tutorial available from the documentation page, above, on how to use the Data Dictionary.
2. In the Schematron file. If you prefer reading code to reading the Data Dictionary, or you just find it easier to search ASCII text, open the corresponding Schematron file and look for the class containing the keyword, and then the keyword itself. You should find one rule that enumerates the entire standard value list.

Unfortunately, neither of these currently have definitions for any of the standard values.

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What Do I Put For...?

A number of attributes in the PDS common classes have standard value lists. You can look the standard values up in either the Data Dictionary - Abridged document or the Schematron file that comes with the PDS4 master schema. Both can be rather tedious to sort through. Following are the most commonly used standard value lists for quick reference. We'll try to keep these updated.

In <Primary_Result_Summary>

<data_regime>

Dust

Electric_Field

Electrons

Far_Infrared

Gamma_Ray

Infrared

Ions

Magnetic_Field

Microwave

Millimeter

Near_Infrared

Particles

Radio

Sub-Millimeter

Ultraviolet

Visible

X-Ray

<type>

Altimetry

Astrometry

Count

E/B-Field_Vectors

Gravity_Model

Image

Magnetometry

Map

Null_Result

Occultation

Photometry

Polarimetry

Radiometry

Shape_Model

Spectrum

<purpose>

Calibration

Checkout

Engineering

Navigation

Science

<processing_level_id>

Calibrated

Derived

Raw

Reduced