61 1 (10,20) 10 "First node" |
61 1 (10,20) 10 "First node" |
62 2 (80,80) 8 "Second node" |
62 2 (80,80) 8 "Second node" |
63 3 (40,10) 10 "Third node" |
63 3 (40,10) 10 "Third node" |
64 \endcode |
64 \endcode |
65 |
65 |
66 The \c \@arcs section is very similar to the \c \@nodes section, |
66 The \c \@arcs section is very similar to the \c \@nodes section, it |
67 it again starts with a header line describing the names of the maps, |
67 again starts with a header line describing the names of the maps, but |
68 but the \c "label" map is not obligatory here. The following lines |
68 the \c "label" map is not obligatory here. The following lines |
69 describe the arcs. The first two tokens of each line are |
69 describe the arcs. The first two tokens of each line are the source |
70 the source and the target node of the arc, respectively, then come the map |
70 and the target node of the arc, respectively, then come the map |
71 values. The source and target tokens must be node labels. |
71 values. The source and target tokens must be node labels. |
72 |
72 |
73 \code |
73 \code |
74 @arcs |
74 @arcs |
75 capacity |
75 capacity |
76 1 2 16 |
76 1 2 16 |
77 1 3 12 |
77 1 3 12 |
78 2 3 18 |
78 2 3 18 |
79 \endcode |
79 \endcode |
80 |
80 |
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81 If there is no map in the \c \@arcs section at all, then it must be |
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82 indicated by a sole '-' sign in the first line. |
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83 |
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84 \code |
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85 @arcs |
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86 - |
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87 1 2 |
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88 1 3 |
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89 2 3 |
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90 \endcode |
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91 |
81 The \c \@edges is just a synonym of \c \@arcs. The \@arcs section can |
92 The \c \@edges is just a synonym of \c \@arcs. The \@arcs section can |
82 also store the edge set of an undirected graph. In such case there is |
93 also store the edge set of an undirected graph. In such case there is |
83 a conventional method for store arc maps in the file, if two columns |
94 a conventional method for store arc maps in the file, if two columns |
84 has the same caption with \c '+' and \c '-' prefix, then these columns |
95 have the same caption with \c '+' and \c '-' prefix, then these columns |
85 can be regarded as the values of an arc map. |
96 can be regarded as the values of an arc map. |
86 |
97 |
87 The \c \@attributes section contains key-value pairs, each line |
98 The \c \@attributes section contains key-value pairs, each line |
88 consists of two tokens, an attribute name, and then an attribute |
99 consists of two tokens, an attribute name, and then an attribute |
89 value. The value of the attribute could be also a label value of a |
100 value. The value of the attribute could be also a label value of a |