Well they need documentation because probably millions of people are using them and/or will use them.
I will take it upon myself to complete a somewhat-full document for them!!! In fact I've already started, but wont get into my methodology.
Instead I'll just post another extensive list that I found via express tools source code, and as impressive as it is I want to share it.
Thankfully I don't believe as extensive as ALL of the express tools functions are, they don't come close to touching the length of items in the following lists:
Enjoy! I don't believe anyone would be up to matching each of these keywords with descriptions and examples heh!
But please, someone prove me wrong
(setq core-symbol-list
'(
"*"
"*ERROR*"
"*VLISP-NEW-FULL-INIT*"
"+"
"-"
"/"
"/="
"1+"
"1-"
":CONSTANTS-PREFIX"
":FALSE"
":METHODS-PREFIX"
":PROG-ID"
":PROPERTIES-PREFIX"
":TLB-FILENAME"
":TRUE"
":VLAX-FALSE"
":VLAX-NULL"
":VLAX-TRUE"
"<"
"<="
"="
">"
">="
"ABS"
"ACAD_COLORDLG"
"ACAD_STRLSORT"
"ACTION_TILE"
"ADD_LIST"
"ADS"
"ALERT"
"ALLOC"
"AND"
"ANGLE"
"ANGTOF"
"ANGTOS"
"APPEND"
"APPLY"
"ARX"
"ARXLOAD"
"ARXUNLOAD"
"ASCII"
"ASSOC"
"ATAN"
"ATOF"
"ATOI"
"ATOM"
"ATOMS-FAMILY"
"BHATCH"
"BHERRS"
"BOOLE"
"BOUNDP"
"BPOLY"
"C:PSDRAG"
"C:PSFILL"
"C:PSIN"
"C:VLIDE"
"CAAAAR"
"CAAADR"
"CAAAR"
"CAADAR"
"CAADDR"
"CAADR"
"CAAR"
"CADAAR"
"CADADR"
"CADAR"
"CADDAR"
"CADDDR"
"CADDR"
"CADR"
"CAR"
"CDAAAR"
"CDAADR"
"CDAAR"
"CDADAR"
"CDADDR"
"CDADR"
"CDAR"
"CDDAAR"
"CDDADR"
"CDDAR"
"CDDDAR"
"CDDDDR"
"CDDDR"
"CDDR"
"CDR"
"CHR"
"CLIENT_DATA_TILE"
"CLOSE"
"COMMAND"
"COND"
"CONS"
"COS"
"CVUNIT"
"DEFUN"
"DEFUN-Q"
"DEFUN-Q-LIST-REF"
"DEFUN-Q-LIST-SET"
"DICTADD"
"DICTNEXT"
"DICTREMOVE"
"DICTRENAME"
"DICTSEARCH"
"DIMX_TILE"
"DIMY_TILE"
"DISTANCE"
"DISTOF"
"DONE_DIALOG"
"END_IMAGE"
"END_LIST"
"ENTDEL"
"ENTGET"
"ENTLAST"
"ENTMAKE"
"ENTMAKEX"
"ENTMOD"
"ENTNEXT"
"ENTSEL"
"ENTUPD"
"EQ"
"EQUAL"
"EVAL"
"EXIT"
"EXP"
"EXPAND"
"EXPT"
"FILL_IMAGE"
"FINDFILE"
"FIX"
"FLOAT"
"FNSPLITL"
"FOREACH"
"FUNCTION"
"GC"
"GCD"
"GETANGLE"
"GETCFG"
"GETCNAME"
"GETCORNER"
"GETDIST"
"GETENV"
"GETFILED"
"GETINT"
"GETKWORD"
"GETORIENT"
"GETPOINT"
"GETREAL"
"GETSTRING"
"GETURL"
"GETVAR"
"GET_ATTR"
"GET_TILE"
"GRAPHSCR"
"GRCLEAR"
"GRDRAW"
"GRREAD"
"GRTEXT"
"GRVECS"
"HANDENT"
"HELP"
"IF"
"INITDIA"
"INITGET"
"INTERS"
"ISMNUGRPLOADED"
"ITOA"
"LAMBDA"
"LAST"
"LAYOUTLIST"
"LENGTH"
"LIST"
"LISTP"
"LOAD"
"LOAD_DIALOG"
"LOG"
"LOGAND"
"LOGIOR"
"LSH"
"MAPCAR"
"MAX"
"MEM"
"MEMBER"
"MENUCMD"
"MENUGROUP"
"MIN"
"MINUSP"
"MODE_TILE"
"MTEDIT"
"MTPROP"
"NAMEDOBJDICT"
"NENTSEL"
"NENTSELP"
"NEW_DIALOG"
"NOT"
"NTH"
"NULL"
"NUMBERP"
"OPEN"
"OR"
"OSNAP"
"PAUSE"
"PI"
"POLAR"
"PRAGMA"
"PRIN1"
"PRINC"
"PRINT"
"PROGN"
"PROMPT"
"QUIT"
"QUOTE"
"READ"
"READ-CHAR"
"READ-LINE"
"REDRAW"
"REGAPP"
"REM"
"REPEAT"
"REPORT"
"REVERSE"
"RTOS"
"SET"
"SETCFG"
"SETENV"
"SETFUNHELP"
"SETQ"
"SETURL"
"SETVAR"
"SETVIEW"
"SET_TILE"
"SIN"
"SLIDE_IMAGE"
"SNVALID"
"SQRT"
"SSADD"
"SSDEL"
"SSGET"
"SSGETFIRST"
"SSLENGTH"
"SSMEMB"
"SSNAME"
"SSNAMEX"
"SSSETFIRST"
"STARTAPP"
"START_DIALOG"
"START_IMAGE"
"START_LIST"
"STRCASE"
"STRCAT"
"STRLEN"
"SUBST"
"SUBSTR"
"T"
"TABLET"
"TBLNEXT"
"TBLOBJNAME"
"TBLSEARCH"
"TERM_DIALOG"
"TERPRI"
"TEXTBOX"
"TEXTPAGE"
"TEXTSCR"
"TRACE"
"TRANS"
"TYPE"
"UNLOAD_DIALOG"
"UNTRACE"
"VECTOR_IMAGE"
"VER"
"VL-ACAD-DEFUN"
"VL-ACAD-UNDEFUN"
"VL-ARX-IMPORT"
"VL-BB-REF"
"VL-BB-SET"
"VL-BT"
"VL-BT-OFF"
"VL-BT-ON"
"VL-CMDF"
"VL-CONSP"
"VL-DIRECTORY-FILES"
"VL-DOC-EXPORT"
"VL-DOC-IMPORT"
"VL-DOC-REF"
"VL-DOC-SET"
"VL-EVERY"
"VL-EXIT-WITH-ERROR"
"VL-EXIT-WITH-VALUE"
"VL-FILE-COPY"
"VL-FILE-DELETE"
"VL-FILE-DIRECTORY-P"
"VL-FILE-RENAME"
"VL-FILE-SIZE"
"VL-FILE-SYSTIME"
"VL-FILENAME-BASE"
"VL-FILENAME-DIRECTORY"
"VL-FILENAME-EXTENSION"
"VL-FILENAME-MKTEMP"
"VL-GET-RESOURCE"
"VL-INFP"
"VL-INIT"
"VL-LIST*"
"VL-LIST->STRING"
"VL-LIST-EXPORTED-FUNCTIONS"
"VL-LIST-LENGTH"
"VL-LIST-LOADED-VLX"
"VL-LOAD-ALL"
"VL-LOAD-COM"
"VL-LOAD-REACTORS"
"VL-MEMBER-IF"
"VL-MEMBER-IF-NOT"
"VL-MKDIR"
"VL-NANP"
"VL-POSITION"
"VL-PRIN1-TO-STRING"
"VL-PRINC-TO-STRING"
"VL-PROPAGATE"
"VL-REGISTRY-DELETE"
"VL-REGISTRY-DESCENDENTS"
"VL-REGISTRY-READ"
"VL-REGISTRY-WRITE"
"VL-REMOVE"
"VL-REMOVE-IF"
"VL-REMOVE-IF-NOT"
"VL-SOME"
"VL-SORT"
"VL-SORT-I"
"VL-STRING->LIST"
"VL-STRING-ELT"
"VL-STRING-LEFT-TRIM"
"VL-STRING-MISMATCH"
"VL-STRING-POSITION"
"VL-STRING-RIGHT-TRIM"
"VL-STRING-SEARCH"
"VL-STRING-SUBST"
"VL-STRING-TRANSLATE"
"VL-STRING-TRIM"
"VL-SYMBOL-NAME"
"VL-SYMBOL-VALUE"
"VL-SYMBOLP"
"VL-UNLOAD-VLX"
"VL-VBALOAD"
"VL-VBARUN"
"VLARTS-INIT"
"VLAX-FOR"
"VLISP-DCLRES-LIST"
"VLISP-DCLRES-LOAD-DIALOG"
"VLISP-EXPORT-SYMBOL"
"VLISP-FASRES-LIST"
"VLISP-FASRES-LOAD"
"VLISP-IMPORT-EXSUBRS"
"VLISP-IMPORT-SYMBOL"
"VLISP-INIRES-LIST"
"VLX-LOADED-P"
"VMON"
"VPORTS"
"WCMATCH"
"WHILE"
"WRITE-CHAR"
"WRITE-LINE"
"XDROOM"
"XDSIZE"
"XSTRCASE"
"ZEROP"
"_VER"
"_VL-FAST-MODE"
"_VL-TIMES"
"_VLISP-VERSION"
"~"
)
)