To support rapid source code development and decrease the  occurrence
  of  syntactic  errors,  LSE  provides  language-specific  tokens  and
  placeholders.  Tokens and placeholders allow  for  the  insertion  of
  source code, within language constructs, by expanding the name a user
  types and by further expanding tokens and placeholders  on  syntactic
  markers.

  On-line help for language features is also provided that is keyed  to
  the names of tokens and placeholders.