An XML Programming Language for Web Service Specification and ...

XL: An XML Programming Language for Web Service Specification and Composition Daniela Florescu

Andreas Grunhagen ¨

Donald Kossmann

XQRL, Inc.

TU Munich

TU Munich, XQRL, Inc.

[email protected]

[email protected]

[email protected]




   !"#%$&#'(
*)
 !"#
+)-,./ 0
!" $1

  !"2,32
4
56!17
 89:!1;= 7  #$"!1 3?*!> 0@BADCEF #)#G)3 '#703%HI'#
 =J6KLM

7 $NJ%()OPRQ70#
S68UTI#
V, 0
WD
=X,.
 '
,P !"Y 0# S!> S$"$"+?*@ 
; 7 #7
 G 
X 0#
@$1!"7 ,L 0#
!>%#$"!"7+ !"Z8[56!1)
\0!"0M]$"
5D
$Z())
7 $1G !"5D
7 #F '7 3,.I7 !"*?*0!"7^0V
 _=!17 $"$>=@7  !"
+)V' *!"@ 0
!" $1

  !"2,V
4`
56!"7
ab
8 8"J$1!1Jb
 0(M )$"!1JL
 =c,\7 !" JL?W6$"D)2S#

 +Jd
5D
6  Je
78 fg  '#
* '7^0V* _=O,P 0
 
 J 0#
4#!"$"!> _=:,-
5$"' !"E, 0
  J#) 0#
\7^0##7
b ;70#!"
5D
%6)S
+)@ J(

5D
;V!1 
#$ZF  
8bf_9)#)!> !"nJ 2
42
56!"7
7 `(G

!"7 !"( 
S!"`7  #$"
~E• #“^’‘ ›žN”„ #‘8c 7 5
 !"!"3S
~70(#
\,Z7  
$1 
+)S
 
3 #; 7


!"6'#4
X27


!"¨  W 9' !1:7 $&  !"7   !1S$&#'(
 JZ '#70cP®D+5SP¯I!" '#$/ !17Jd()  
W!"#)c,*Q#HnM]4#
+)†°%oP9QOhN
8 8"JT%7 $"
;oP3pj^JL  !>~6 '
Y,%#)!" - 0(G !"#0

 $>=!" $1!"
m6'#m4=c!> 
$"
5 P4' %7 F $>=†()
 P#
;!1 

)!1 
)#G M„ F,.S !" 8B%OPB2
4E##$"!"7+G !1E4'#!"$> S  '#70@ 
7^0#$"!"
%?*!"$"$e0#+5D
I  )
+$t?*!> 09)!>± 7 '$> !1
\ '7^0V | «8PnMg®D+5† !" SG 7^0n|SPU)#G †m'#F Y4=)
+$1!"Y?*!" 0VSM '($"$"=8f_()

+)tJ# 0#
^
mG
- !1#!>}(7  
‡t

%4)M](G

_=@5D
()*!" 0#

m)!>
7^M

!" 8m£%+?
5D
^+J