LSE provides the following commands  for  creating  and  manipulating
  language elements:

       DEFINE ALIAS [/LANGUAGE=name]
           specifies the alias name to be defined in the specified
           language.

       DEFINE LANGUAGE name
           specifies characteristics for the current language.

       DEFINE PLACEHOLDER [/LANGUAGE=name]
           specifies placeholder characteristics for the specified
           language.

       DEFINE TOKEN [/LANGUAGE=name]
           specifies token characteristics for the specified language.

       DELETE ALIAS [/LANGUAGE=name]
           cancels the effect of a DEFINE ALIAS command used for the
           specified language.

       DELETE LANGUAGE name
           cancels the effect of a DEFINE LANGUAGE command.

       DELETE PLACEHOLDER [/LANGUAGE=name]
           cancels the effects of a DEFINE PLACEHOLDER command used for
           the specified language.

       DELETE TOKEN [/LANGUAGE=name]
           cancels the effect of DEFINE TOKEN command used in the
           specified language.

       DO
           executes LSE commands or VAXTPU program statements.

       END DEFINE
           terminates a DEFINE TOKEN or DEFINE PLACEHOLDER command.

       EXTRACT LANGUAGE language-name
           selects the definition of the named language and formats it
           as a command.

       HELP/LANGUAGE [name | * ]
           displays help information about the specified language.

       MODIFY LANGUAGE name
           modifies the characteristics of a specified language.

       SAVE ENVIRONMENT file-spec
           writes all user-defined languages, tokens, and placeholders
           to a specified file.

       SHOW ALIAS name [/LANGUAGE=name]
           displays the characteristics of the specified alias for the
           specified language.

       SHOW LANGUAGE [ name | * ]
           displays the characteristics of the specified language.

       SHOW TOKEN name [/LANGUAGE=name]
           displays the characteristics of the specified token for the
           specified language.

       SHOW PLACEHOLDER name [/LANGUAGE=name]
           displays the characteristics of the specified placeholder for
           the specified language.