.PS copy "sequence.pic";The
.PS
marks the beginning of pic commands.
The sequence
copy "sequence.pic";
loads the macros defining the sequence diagram operations.
The file sequence.pic
, part of the UMLGraph distribution,
must exist in the directory where pic2plot will be executed.
Sequence diagram files must end with the sequence:
.PEThe sequence diagrams are defined by calling function-like pic macros. Each function call is terminated with a semicolon. Space is not significant between macro calls; on the other hand adding a space character between a macro's arguments can lead to surprises and should be avoided. Objects are referenced using variable-like alphanumeric identifiers. Strings are enclosed in double quotes. As an example, the following defines an object
O
that will be identified in the diagram as
o:Toolkit
object(O,"o:Toolkit");Comments start with a
#
character.
# This is a comment
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