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ODS-5 Case blind matches and special DCL escapes

See what VMS does:

$ set proc/parse/case
$ create/symlink="hello" world
$ set proc/parse=ex/case=sens
$ create hello
hello !
$ create HELLO
HELLO !!
$ create Hello
Hello !!!

              /parse/case /parse=ex/case /parse/case=sen /parse=ex/case=sen

dir hello.    HELLO.;1	  HELLO.;1	 HELLO.;1	 hello.;1
    	      Hello.;1	  Hello.;1
	      hello.;1	  hello.;1
dir HELLO.    HELLO.;1	  HELLO.;1	 HELLO.;1	 HELLO.;1
    	      Hello.;1	  Hello.;1
	      hello.;1	  hello.;1
dir Hello.    HELLO.;1	  HELLO.;1	 HELLO.;1	 Hello.;
    	      Hello.;1	  Hello.;1
	      hello.;1	  Hello.;1
type hello.   HELLO !!	  HELLO !!	 HELLO !!	 hello !
type HELLO.   HELLO !!	  HELLO !!	 HELLO !!	 HELLO !!
type Hello.   HELLO !!	  HELLO !!	 HELLO !!	 Hello !!!
type world.   hello !	  hello !	 hello !	 -RMS-E-FNF
type WORLD.   hello !	  hello !	 hello !	 hello !
type World.   hello !	  hello !	 hello !	 -RMS-E-FNF

--------------------------------------------------------- delete hello.;1

type world.   HELLO !!	  HELLO !	 -RMS-E-FNF	 -RMS-E-FNF
type WORLD.   HELLO !!	  HELLO !	 -RMS-E-FNF	 -RMS-E-FNF
type World.   HELLO !!	  HELLO !	 -RMS-E-FNF	 -RMS-E-FNF

--------------------------------------------------------- delete HELLO.;1

type world.   Hello !!	  Hello !	 -RMS-E-FNF	 -RMS-E-FNF
type WORLD.   Hello !!	  Hello !	 -RMS-E-FNF	 -RMS-E-FNF
type World.   Hello !!	  Hello !	 -RMS-E-FNF	 -RMS-E-FNF

--------------------------------------------------------- delete Hello.;1

cre world.    hello.;1    hello.;1	 hello.;1	  world.;1
cre WORLD.    hello.;1    hello.;1       hello.;1	  hello.;1
cre World.    hello.;1    hello.;1       hello.;1	  World.;1

cre hello     HELLO.;1	  hello.;1	 HELLO.;1	  hello.;1
cre WORLD.    HELLO.;2    hello.;2	 hello.;1	  hello.;2

cre/sym=t s   S.;1->T	  S.;1->T	 S.;1->T	  S.;1->T

cre "^UP^p"   p.;1	  p.;1	     	 p.;1	     	  p.;1

$ cre/syml="^UP^Posix" x
$ cre x
[ Exit ] 
$ dir
 
Directory LDA5:[ZZ]
 
X.;1                ^^UP^^Posix.;1      
 
Total of 2 files.
$