Creation of Hierarchic Text with a Computer Display

actions appear Appendix AREA ARITHX ATTR automatic BITX block button called Chapter CHAR characters choices commands CONSTANT construction contains context contracted COPY created data structure definition deleted described display element Emily system engineering enter entry errors example expand experience EXPR expressions facility Figure followed formalism fragment function given hierarchical holophrast identifier implemented INDENT INDENT+4 indicated insert instance interaction keyboard label language light pen manipulation means mechanism menu messages modify MOVE node non-terminal symbol operations options PL/I pointer pointing possible principle problem procedure pushes reference replaced represent returns routines rule saved selection sequence shown shows simply SNDMT2 specify statements status step STMT stored string STRUCT subnode syntactic syntax tables terminal tion tree