Crthuky

I'm documenting the different versions of database drawing styles.
this link shows how it looks like in a real diagram but my intention is to document only one side of the connection lines. Now the sample shows really perfectly how to draw and its done by chaining some PGF and TikZ code but I'm not able to rework it to a single line ending in Crow's Foot design line end. Like a 1:1 connection is this: -||--- it always also shows the other end as if its used within a diagram 1:1-1:1 like this -||------||-.

Maybe somebody can show me how to change the PGF code to get a single Crow's Foot? Here is my MWE:

 documentclassarticle% 
 usepackagetikz
 usetikzlibrary%
 chains,
 
 tikzset
 dummy/.style=
 rectangle,
 rounded corners,
 draw=white, very thick,
 text centered,
 zig zag to/.style=
 to path=- (tikztotarget) tikztonodes
 ,
 zig zag to/.default=0.5,
 one to one/.style=
 one-one, zig zag to
 , 
 one to many/.style=
 one-crow's foot, zig zag to,
 ,
 one to omany/.style=
 one-omany, zig zag to
 , 
 many to one/.style=
 crow's foot-one, zig zag to
 ,
 many to many/.style=
 crow's foot-crow's foot, zig zag to
 , 
 
 makeatletter
 pgfarrowsdeclarecrow's footcrow's foot
 
 pgfarrowsleftextend+-.5pgflinewidth%
 pgfarrowsrightextend+.5pgflinewidth%
 
 
 pgfutil@tempdima=0.6pt%
 %advancepgfutil@tempdima by.25pgflinewidth%
 pgfsetdash+0pt%
 pgfsetmiterjoin%
 pgfpathmovetopgfqpoint0pt-9pgfutil@tempdima%
 pgfpathlinetopgfqpoint-13pgfutil@tempdima0pt%
 pgfpathlinetopgfqpoint0pt9pgfutil@tempdima%
 pgfpathmovetopgfqpoint0pgfutil@tempdima0pgfutil@tempdima%
 pgfpathmovetopgfqpoint-8pt-6pt% 
 pgfpathlinetopgfqpoint-8pt-6pt% 
 pgfpathlinetopgfqpoint-8pt6pt% 
 pgfusepathqstroke%
 

 pgfarrowsdeclareomanyomany
 
 pgfarrowsleftextend+-.5pgflinewidth%
 pgfarrowsrightextend+.5pgflinewidth%
 
 
 pgfutil@tempdima=0.6pt%
 %advancepgfutil@tempdima by.25pgflinewidth%
 pgfsetdash+0pt%
 pgfsetmiterjoin%
 pgfpathmovetopgfqpoint0pt-9pgfutil@tempdima%
 pgfpathlinetopgfqpoint-13pgfutil@tempdima0pt%
 pgfpathlinetopgfqpoint0pt9pgfutil@tempdima%
 pgfpathmovetopgfqpoint0pgfutil@tempdima0pgfutil@tempdima% 
 pgfpathmovetopgfqpoint0pgfutil@tempdima0pgfutil@tempdima%
 pgfpathmovetopgfqpoint-6pt-6pt% 
 pgfpathcirclepgfpoint-11.5pt0 3.5pt
 pgfusepathqstroke%
 

 pgfarrowsdeclareoneone
 
 pgfarrowsleftextend+-.5pgflinewidth%
 pgfarrowsrightextend+.5pgflinewidth%
 
 
 pgfutil@tempdima=0.6pt%
 %advancepgfutil@tempdima by.25pgflinewidth%
 pgfsetdash+0pt%
 pgfsetmiterjoin%
 pgfpathmovetopgfqpoint0pgfutil@tempdima0pgfutil@tempdima%
 pgfpathmovetopgfqpoint-6pt-6pt% 
 pgfpathlinetopgfqpoint-6pt-6pt% 
 pgfpathlinetopgfqpoint-6pt6pt% 
 pgfpathmovetopgfqpoint0pgfutil@tempdima0pgfutil@tempdima%
 pgfpathmovetopgfqpoint-8pt-6pt% 
 pgfpathlinetopgfqpoint-8pt-6pt% 
 pgfpathlinetopgfqpoint-8pt6pt% 
 pgfusepathqstroke%
 
 defproperty#1node[name=entityname-#1, every property/.try]#1;
 defpropertiesbegingroupcatcode`_=11relaxprocessproperties
 defprocessproperties#1endgroup%
 defpropertycode%
 foreach p in #1%
 expandafterexpandafterexpandaftergdefexpandafterexpandafterexpandafterpropertycode%
 expandafterexpandafterexpandafterexpandafterpropertycodeexpandafterpropertyexpandafterp\%
 %
 propertycode%
 
 defpk#1node[name=entityname-#1, every property/.try]#1;
 node[name=entityname-#1, every property/.try, red, text width=1in, align=right,](PK);
 \
 deffk#1node[name=entityname-#1, every property/.try]#1;
 node[name=entityname-#1, every property/.try, red, text width=1in, align=right](FK);
 \ 




 begindocument
 sectionNotation Versions 
 begintabularlllll
 NOTATION & ==1 & 0 to 1 & 1 to n & n to n \[1em]
 IEM & & & & \[1em]
 CHEN & 1:1 & 0:1 & 1:n & 0:n \[1em]
 endtabular\[5em]
 scalebox0.4
 begintikzpicture
 node[dummy, inner sep=5pt] (a) ;
 node[dummy, inner sep=5pt,right=2cm of a] (b) ;
 draw[one to one] (a.east) -- node[above] (b.west);
 endtikzpicture
 
 scalebox0.4
 begintikzpicture
 node[dummy, inner sep=5pt] (a) ;
 node[dummy, inner sep=5pt,right=2cm of a] (b) ;
 draw[one to many] (a.east) -- node[above] (b.west);
 endtikzpicture
 
 scalebox0.4
 begintikzpicture
 node[dummy, inner sep=5pt] (a) ;
 node[dummy, inner sep=5pt,right=2cm of a] (b) ;
 draw[one to omany] (a.east) -- node[above] (b.west);
 endtikzpicture
 
 scalebox0.4
 begintikzpicture
 node[dummy, inner sep=5pt] (a) ;
 node[dummy, inner sep=5pt,right=2cm of a] (b) ;
 draw[many to one] (a.east) -- node[above] (b.west);
 endtikzpicture
 
 scalebox0.4
 begintikzpicture
 node[dummy, inner sep=5pt] (a) ;
 node[dummy, inner sep=5pt,right=2cm of a] (b) ;
 draw[many to many] (a.east) -- node[above] (b.west);
 endtikzpicture
 


 enddocument

After geting this part as one side i have a additional Question about this Crow's Foot drawing lines with PGF.

I need to add a line end that is not yet implemented. It is called 0 to 1 and lookes like this: -|O---
I tried to understand how the crow's Foot is drawn but i can't follow where it comes from. Can somebody show me the code where the three toe's of the crow's foot are drawn/coded?
Maybe then i can get a blend of "one" = -||--- and "omany" = /|O---

This is the end product of this discussion for anybody whanting to do the same in future:

 documentclassarticle % say 
 usepackagetikz
 usetikzlibrary%
 chains,
 
 tikzset
 dummy/.style=
 rectangle,
 rounded corners,
 draw=white, very thick,
 text centered,
 zig zag to/.style= %this is the connection of lines and nodes
 to path=- (tikztotarget) tikztonodes
 ,
 zig zag to/.default=0.5,
 one to one/.style=
 one-one, zig zag to
 , 
 none to one/.style=
 one-, zig zag to
 ,
 none to oone/.style=
 oone-, zig zag to
 ,
 one to many/.style=
 one-crow's foot, zig zag to,
 ,
 none to many/.style=
 crow's foot-, zig zag to,
 ,
 one to omany/.style=
 one-omany, zig zag to
 ,
 none to omany/.style=
 omany-, zig zag to
 , 
 many to one/.style=
 crow's foot-one, zig zag to
 ,
 many to many/.style=
 crow's foot-crow's foot, zig zag to
 ,
 
 makeatletter
 pgfarrowsdeclarecrow's footcrow's foot %this is many
 
 pgfarrowsleftextend+-.5pgflinewidth%
 pgfarrowsrightextend+.5pgflinewidth%
 
 
 pgfutil@tempdima=0.6pt%
 %advancepgfutil@tempdima by.25pgflinewidth%
 pgfsetdash+0pt%
 pgfsetmiterjoin%
 pgfpathmovetopgfqpoint0pt-9pgfutil@tempdima%
 pgfpathlinetopgfqpoint-13pgfutil@tempdima0pt%
 pgfpathlinetopgfqpoint0pt9pgfutil@tempdima%
 pgfpathmovetopgfqpoint0pgfutil@tempdima0pgfutil@tempdima%
 pgfpathmovetopgfqpoint-8pt-6pt% 
 pgfpathlinetopgfqpoint-8pt-6pt% 
 pgfpathlinetopgfqpoint-8pt6pt% 
 pgfusepathqstroke%
 

 pgfarrowsdeclareomanyomany %this is omany
 
 pgfarrowsleftextend+-.5pgflinewidth%
 pgfarrowsrightextend+.5pgflinewidth%
 
 
 pgfutil@tempdima=0.6pt%
 %advancepgfutil@tempdima by.25pgflinewidth%
 pgfsetdash+0pt%
 pgfsetmiterjoin%
 pgfpathmovetopgfqpoint0pt-9pgfutil@tempdima%
 pgfpathlinetopgfqpoint-13pgfutil@tempdima0pt%
 pgfpathlinetopgfqpoint0pt9pgfutil@tempdima%
 pgfpathmovetopgfqpoint0pgfutil@tempdima0pgfutil@tempdima% 
 pgfpathmovetopgfqpoint0pgfutil@tempdima0pgfutil@tempdima%
 pgfpathmovetopgfqpoint-6pt-6pt% 
 pgfpathcirclepgfpoint-11.5pt0 3.5pt
 pgfusepathqstroke%
 

 pgfarrowsdeclareoneone %this is one
 
 pgfarrowsleftextend+-.5pgflinewidth%
 pgfarrowsrightextend+.5pgflinewidth%
 
 
 pgfutil@tempdima=0.6pt%
 %advancepgfutil@tempdima by.25pgflinewidth%
 pgfsetdash+0pt%
 pgfsetmiterjoin%
 pgfpathmovetopgfqpoint0pgfutil@tempdima0pgfutil@tempdima%
 pgfpathmovetopgfqpoint-6pt-6pt% 
 pgfpathlinetopgfqpoint-6pt-6pt% 
 pgfpathlinetopgfqpoint-6pt6pt% 
 pgfpathmovetopgfqpoint0pgfutil@tempdima0pgfutil@tempdima%
 pgfpathmovetopgfqpoint-8pt-6pt% 
 pgfpathlinetopgfqpoint-8pt-6pt% 
 pgfpathlinetopgfqpoint-8pt6pt% 
 pgfusepathqstroke%
 

 pgfarrowsdeclareooneoone
 
 pgfarrowsleftextend+-.5pgflinewidth%
 pgfarrowsrightextend+.5pgflinewidth%
 
 
 pgfutil@tempdima=0.6pt%
 %advancepgfutil@tempdima by.25pgflinewidth%
 pgfsetdash+0pt%
 pgfsetmiterjoin%
 pgfpathmovetopgfqpoint0pgfutil@tempdima0pgfutil@tempdima%
 pgfpathmovetopgfqpoint-6pt-6pt% 
 pgfpathlinetopgfqpoint-6pt-6pt% 
 pgfpathlinetopgfqpoint-6pt6pt% 
 pgfpathcirclepgfpoint-11.5pt0 3.5pt
 pgfusepathqstroke%
 

 defproperty#1node[name=entityname-#1, every property/.try]#1;
 defpropertiesbegingroupcatcode`_=11relaxprocessproperties
 defprocessproperties#1endgroup%
 defpropertycode%
 foreach p in #1%
 expandafterexpandafterexpandaftergdefexpandafterexpandafterexpandafterpropertycode%
 expandafterexpandafterexpandafterexpandafterpropertycodeexpandafterpropertyexpandafterp\%
 %
 propertycode%
 
 begindocument

 sectionNotation Versions 
 begintabularlllll
 NOTATION & ==1 & 0 to 1 & 1 to n & 0 to m \[1em]%zeile 1
 IEM / crow's foot%
 & % == 1 
 scalebox0.5 
 begintikzpicture
 node[dummy, inner sep=5pt] (a) ;
 node[dummy, inner sep=5pt,right=1cm of a] (b) ;
 draw[none to one] (a.east) -- node[above] (b.west);
 endtikzpicture
 & % 0 to 1
 scalebox0.5
 begintikzpicture
 node[dummy, inner sep=5pt] (a) ;
 node[dummy, inner sep=5pt,right=1cm of a] (b) ;
 draw[none to oone] (a.east) -- node[above] (b.west);
 endtikzpicture
 & % 1 to n
 scalebox0.5
 begintikzpicture
 node[dummy, inner sep=5pt] (a) ;
 node[dummy, inner sep=5pt,right=1cm of a] (b) ;
 draw[none to many] (a.east) -- node[above] (b.west);
 endtikzpicture
 & % n to m
 scalebox0.5
 begintikzpicture
 node[dummy, inner sep=5pt] (a) ;
 node[dummy, inner sep=5pt,right=1cm of a] (b) ;
 draw[none to omany] (a.east) -- node[above] (b.west);
 endtikzpicture
 \[1em]%zeile 2
 CHEN & 1:1 & 0:1 & 1:n & 0:n \[1em]%zeile 3
 endtabular\[2em]
 enddocument

Look at the one to none style in the following MWE.

Edit: to answer to the additional question, I've added omany to none and oone to none.

Edit n.2: added many to one and restyled.

documentclassarticle
usepackagebooktabs
usepackagearray
renewcommandarraystretch1.4
usepackagetikz
tikzset
 zig zag to/.style=
 to path=- (tikztotarget) tikztonodes
 ,
 zig zag to/.default=0.5,
 one to one/.style=
 one-one, zig zag to
 , 
 one to none/.style=
 one-, zig zag to
 , 
 oone to none/.style=
 oone-, zig zag to
 , 
 omany to none/.style=
 omany-, zig zag to
 , 
 one to many/.style=
 one-crow's foot, zig zag to,
 ,
 one to omany/.style=
 one-omany, zig zag to
 , 
 many to one/.style=
 crow's foot-one, zig zag to
 ,
 many to many/.style=
 crow's foot-crow's foot, zig zag to
 , 
 many to none/.style= 
 crow's foot-, zig zag to 
 ,
 
makeatletter
pgfarrowsdeclarecrow's footcrow's foot

 pgfarrowsleftextend+-.5pgflinewidth%
 pgfarrowsrightextend+.5pgflinewidth%


 pgfutil@tempdima=0.6pt%
 %advancepgfutil@tempdima by.25pgflinewidth%
 pgfsetdash+0pt%
 pgfsetmiterjoin%
 pgfpathmovetopgfqpoint0pt-9pgfutil@tempdima%
 pgfpathlinetopgfqpoint-13pgfutil@tempdima0pt%
 pgfpathlinetopgfqpoint0pt9pgfutil@tempdima%
 pgfpathmovetopgfqpoint0pgfutil@tempdima0pgfutil@tempdima%
 pgfpathmovetopgfqpoint-8pt-6pt% 
 pgfpathlinetopgfqpoint-8pt-6pt% 
 pgfpathlinetopgfqpoint-8pt6pt% 
 pgfusepathqstroke%


pgfarrowsdeclareomanyomany

 pgfarrowsleftextend+-.5pgflinewidth%
 pgfarrowsrightextend+.5pgflinewidth%


 pgfutil@tempdima=0.6pt%
 %advancepgfutil@tempdima by.25pgflinewidth%
 pgfsetdash+0pt%
 pgfsetmiterjoin%
 pgfpathmovetopgfqpoint0pt-9pgfutil@tempdima%
 pgfpathlinetopgfqpoint-13pgfutil@tempdima0pt%
 pgfpathlinetopgfqpoint0pt9pgfutil@tempdima%
 pgfpathmovetopgfqpoint0pgfutil@tempdima0pgfutil@tempdima% 
 pgfpathmovetopgfqpoint0pgfutil@tempdima0pgfutil@tempdima%
 pgfpathmovetopgfqpoint-6pt-6pt% 
 pgfpathcirclepgfpoint-11.5pt0 3.5pt
 pgfusepathqstroke%


pgfarrowsdeclareooneoone

 pgfarrowsleftextend+-.5pgflinewidth%
 pgfarrowsrightextend+.5pgflinewidth%


 pgfutil@tempdima=0.6pt%
 %advancepgfutil@tempdima by.25pgflinewidth%
 pgfsetdash+0pt%
 pgfsetmiterjoin%
 pgfpathmovetopgfqpoint0pgfutil@tempdima0pgfutil@tempdima%
 pgfpathmovetopgfqpoint-6pt-6pt% 
 pgfpathlinetopgfqpoint-6pt-6pt% 
 pgfpathlinetopgfqpoint-6pt6pt% 
 pgfpathcirclepgfpoint-11.5pt0 3.5pt
 pgfusepathqstroke%


pgfarrowsdeclareoneone

 pgfarrowsleftextend+-.5pgflinewidth%
 pgfarrowsrightextend+.5pgflinewidth%


 pgfutil@tempdima=0.6pt%
 %advancepgfutil@tempdima by.25pgflinewidth%
 pgfsetdash+0pt%
 pgfsetmiterjoin%
 pgfpathmovetopgfqpoint0pgfutil@tempdima0pgfutil@tempdima%
 pgfpathmovetopgfqpoint-6pt-6pt% 
 pgfpathlinetopgfqpoint-6pt-6pt% 
 pgfpathlinetopgfqpoint-6pt6pt% 
 pgfpathmovetopgfqpoint0pgfutil@tempdima0pgfutil@tempdima%
 pgfpathmovetopgfqpoint-8pt-6pt% 
 pgfpathlinetopgfqpoint-8pt-6pt% 
 pgfpathlinetopgfqpoint-8pt6pt% 
 pgfusepathqstroke%


begindocument
sectionNotation Versions 
begintabularlcc
 toprule
 Notation & IEM & CHEN \
 midrule
 one to none &
 tikzdraw[one to none] (0,0) -- ++(1.5,0); & 1:0\
 one to one & tikzdraw[one to one] (0,0) -- ++(1.5,0); & 1:1\
 one to many & tikzdraw[one to many] (0,0) -- ++(1.5,0); & 1:n\
 many to none & tikzdraw[many to none] (0,0) -- ++(1.5,0); & n:0\
 one to (none or one or many) &tikzdraw[one to omany] (0,0) -- ++(1.5,0); & \ 
 many to one & tikzdraw[many to one] (0,0) -- ++(1.5,0); & n:1\ 
 many to many &tikzdraw[many to many] (0,0) -- ++(1.5,0); & n:m\
 (none or one or many) to none &tikzdraw[omany to none] (0,0) -- ++(1.5,0); & \
 (none or one) to none &tikzdraw[oone to none] (0,0) -- ++(1.5,0); & \
 bottomrule
endtabular
enddocument