Wgraph:Example 4

In this example we do not use relations which were explicitly defined via template calls. Instead we use the normal hyperlinks.

Thus we loose some semantics but we can apply this kind of graph generation to any existing wiki contents!

To make the graph prettier, we assign colors to the categories (Impressionism = magenta, Expressionism = yellow). We could also make shapes dependent from (other) categories ..

Our example shows links from articles of category "Painter" to other articles of category "Painter". Note the birectional link between Renoir and Cezanne.

In the SVG graph each node points to its wiki page.

First we show the output of the DPL query which is embedded in the Wgraph definition:

DPL result: The painters	DPL result: Their relations
Van Gogh . . Categories: Expressionism | Painter Renoir . . Categories: Impressionism | Painter Cezanne . . Categories: Painter Manet . . Categories: Painter Signac . . Categories: Impressionism | Painter	Cezanne -- Renoir Manet -- Renoir Renoir -- Cezanne Signac -- Renoir

---

Below we see the graph and the WGL source which is generated by DPL;
The nodetype statements were written by hand to make the result more pretty:

{{#wgraph: svg | thumb=40 | wgl |

 // the painters
 
 node 'Van Gogh' { type = 'Expressionism, Painter' }
 node 'Renoir' { type = 'Impressionism, Painter' }
 node 'Cezanne' { type = 'Painter' }
 node 'Manet' { type = 'Painter' }
 node 'Signac' { type = 'Impressionism, Painter' }

 // their relations
 
 edge from 'Cezanne' to 'Renoir' {}
 edge from 'Manet' to 'Renoir' {}
 edge from 'Renoir' to 'Cezanne' {}
 edge from 'Signac' to 'Renoir' {}

 // attribute settings for categories
 nodetype 'undefined node' { href '%%' }
 nodetype Impressionism { color lightmagenta href %% }
 nodetype Expressionism { color lightyellow href %% }

}}