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    Types: TextFile
    Names: »figureA-13.pic«

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TextFile

\def\sprotocol{[ISO/IEC 8327]}
\def\tservice{[ISO/IEC 8072]}
\def\sservice{[ISO/IEC 8326]}
.PS 5.0i
lineht  =       3*lineht/2
## figure APS-1
B1:     box "\sf session" "\sf user"
        line down from B1.s
B3:     box "\sf session" "\sf entity"
        line down from B3.s
B5:     box invis
##
B2:     box "\sf session" "\sf user" with .w at (B1.e.x+3*linewid, B1.e.y)
        line down from B2.s
B4:     box "\sf session" "\sf entity"
        line down from B4.s
B6:     box invis
##
        line dashed from (B1.w.x-linewid/2, (B1.s.y+B3.n.y)/2) \
                    to   (B2.e.x+linewid/2, (B2.s.y+B4.n.y)/2)
        box invis with .w at (B2.e.x, (B2.s.y+B4.n.y)/2) \
            "\sf \begin{tabular}{r}session service\\ \sservice\end{tabular}"
##
        line dashed from (B3.w.x-linewid/2, (B3.s.y+B5.n.y)/2) \
                    to   (B4.e.x+linewid/2, (B4.s.y+B6.n.y)/2)
        box invis with .w at (B4.e.x, (B4.s.y+B6.n.y)/2) \
            "\sf \begin{tabular}{r}transport service\\ \tservice\end{tabular}"
##
        line <-> from B3.e to B4.w dashed
        move to ((B3.e.x+B4.w.x)/2, B3.e.y) \
            "\sf \begin{tabular}{c} session protocol\\ \sprotocol\end{tabular}"
##
B7:     box "\sf transport provider" with .nw at B5.nw width (B6.ne.x-B5.nw.x)
##
B8:     box invis "\sf session service access point" \
                with .n at ((B1.c.x+B2.c.x)/2, B1.s.y) \
                height boxht/2 width 3*boxwid/2
        arrow from (B8.sw.x, B8.sw.y+boxht/10) \
                to (B3.n.x+linewid/12, (B1.s.y+B3.n.y)/2+lineht/20)
        arrow from (B8.se.x, B8.se.y+boxht/10) \
                to (B4.n.x-linewid/12, (B2.s.y+B4.n.y)/2+lineht/20)
##
.PE