ANSI/NISO Z39.102-2017

8 ANSI/NISO Z39.102-2017 STS (Version 1.0) • 8.2 Attributes

8.2.143 @units Units

The units of measure in which the size or length of a cited work is expressed (for example, a @units value might record pages, minutes, seconds, or linear-feet).

In element <size>, this attribute must be used if the element is used.
Value Meaning
Text, numbers, or special characters Names the units of measure in which the size is expressed, for example, MB.