| Description: The unit_id attribute provides a character or character string that serves as an abbreviation for, or symbol representing, a unit of measure. |
| Namespace Id: pds | Steward: pds | Class Name: Units_of_Length | Type: UTF8_Short_String_Collapsed |
| Minimum Value: None | Maximum Value: None | Minimum Characters: 1 | Maximum Characters: 255 |
| Unit of Measure Type: None | Default Unit Id: None | Attribute Concept: ID | Conceptual Domain: Short_String |
| Status: Active | Nillable: false | Pattern: None |
| Permissible Value(s) | Value | Value Meaning |
| | AU | AU is an abbreviation for astronomical unit, which is a unit of length (1 AU = 149,597,870,700 meters). |
| | Angstrom | Angstrom, also known as angstrom, is a unit of length (10**10 angstrom = ten billion angstroms = 1 meter). |
| | cm | cm is an abbreviation for centimeter, which is a unit of length (100 cm = one hundred centimeters = 1 meter). |
| | km | km is an abbreviation for kilometer, which is a unit of length (1 km = 10**3 meters = one thousand meters). |
| | m | m is an abbreviation for meter, which is a unit of length (an SI base unit). |
| | micrometer | micrometer, also known as micron, is a unit of length (10**6 micron = one million micrometers = 1 meter). |
| | mm | mm is an abbreviation for millimeter, which is a unit of length (10**3 mm = one thousand millimeters = 1 meter). |
| | nm | nm is an abbreviation for nanometer, which is a unit of length (10**9 nm = one billion nanometers = 1 meter). |