Built-in GNML tags and variables have unique, reserved and case sensitive tag names.

Unique

It means that the tag names are not allowed to repeat.

Reserved

It means that cannot be used as tag names of user-defined GNML tag and styles.

Case sensitive

It means that the tag names have to be typed in exact case as specified in this manual. Otherwise, the names are not recognized and justification error message is displayed.

Names of built-in GNML tags are always in lower case letters, e.g.; >h...<, >ld..<.

Names of built-in GNML variables are combination of upper case and lower case letters, e.g.; H, LD, CapH, DesD.