The !0 notation denotes the first diagram. 17.3 Constant definition You can define constant using the !define directive. As in C language, a constant name can only use alphanumeric and underscore characters include directive to define all your constants in a single file that you include in your diagram. Constant can be undefined with the !undef XXX directive. You can also specify constants within the command directives will be included only if the constant after the !ifdef directive has been defined before. You can also provide a !else part which will be included if the constant has not been defined. @startuml

The !0 notation denotes the first diagram. 19.3 Constant definition You can define constant using the !define directive. As in C language, a constant name can only use alphanumeric and underscore characters include directive to define all your constants in a single file that you include in your diagram. Constant can be undefined with the !undef XXX directive. You can also specify constants within the command directives will be included only if the constant after the !ifdef directive has been defined before. You can also provide a !else part which will be included if the constant has not been defined. @startuml

The !0 notation denotes the first diagram. 17.3 Constant definition You can define constant using the !define directive. As in C language, a constant name can only use alphanumeric and underscore characters include directive to define all your constants in a single file that you include in your diagram. Constant can be undefined with the !undef XXX directive. You can also specify constants within the command directives will be included only if the constant after the !ifdef directive has been defined before. You can also provide a !else part which will be included if the constant has not been defined. @startuml

The !0 notation denotes the first diagram. 17.3 Constant definition You can define constant using the !define directive. As in C language, a constant name can only use alphanumeric and underscore characters include directive to define all your constants in a single file that you include in your diagram. Constant can be undefined with the !undef XXX directive. You can also specify constants within the command directives will be included only if the constant after the !ifdef directive has been defined before. You can also provide a !else part which will be included if the constant has not been defined. @startuml