Simple html tag

You can use Gravizo including an image tag <img src='http://g.gravizo.com/g? follow by a graph description writed in DOT, PlantUML or UMLGraph, and then close the image tag

<img src='http://g.gravizo.com/g?
 digraph G {
   main -> parse -> execute;
   main -> init;
   main -> cleanup;
   execute -> make_string;
   execute -> printf
   init -> make_string;
   main -> printf;
   execute -> compare;
 }
'/>

Using markdown syntax in github.com

Also can use Markdown syntax including a image tag and then the url content include DOT, PlantUML or UMLGraph syntax. Don't forget to close the image tag.

![Alt text](http://g.gravizo.com/g?
  digraph G {
    aize ="4,4";
    main [shape=box];
    main -> parse [weight=8];
    parse -> execute;
    main -> init [style=dotted];
    main -> cleanup;
    execute -> { make_string; printf}
    init -> make_string;
    edge [color=red];
    main -> printf [style=bold,label="100 times"];
    make_string [label="make a string"];
    node [shape=box,style=filled,color=".7 .3 1.0"];
    execute -> compare;
  }
)
DOT sample with Gravizo

Use it on you README.md at github to show the graph directly in your home page. Here is a sample

Using indirect markdown syntax in bitbucket.org

Use http://gravizo.com/source/custom_mark?source_url_url_encoded to point source_url_url_encoded where is the source for the graph. Use custom_mark to delimit where the source is. Also include a blank image to hide source if you want.

![Alt text](http://g.gravizo.com/source/thiisthemark?http%3A%2F%2Fwww.gravizo.com)
![Alt text](http://www.gravizo.com/img/1x1.png#

thiisthemark        
@startuml
object Object01
object Object02
object Object03
object Object04
object Object05
object Object06
object Object07
object Object08

Object01 <|-- Object02
Object03 *-- Object04
Object05 o-- "4" Object06
Object07 .. Object08 : some labels
@enduml
thiisthemark        
)
        
Plantuml sample with indirect Gravizo

More at bitbucket.org

<img src='http://g.gravizo.com/g?
@startuml;

actor User;
participant "First Class" as A;
participant "Second Class" as B;
participant "Last Class" as C;

User -> A: DoWork;
activate A;

A -> B: Create Request;
activate B;

B -> C: DoWork;
activate C;

C --> B: WorkDone;
destroy C;

B --> A: Request Created;
deactivate B;

A --> User: Done;
deactivate A;

@enduml
'>
        
PlantUML sample with Gravizo
<img src='http://g.gravizo.com/g?
/**
*Structural Things
[email protected] commentname
[email protected] Notes can
*be extended to
*span multiple lines
*/
class Structural{}

/**
[email protected] all
[email protected] Class
*/
class Counter extends Structural {
        static public int counter;
        public int getCounter%28%29;
}

/**
[email protected] shape activeclass
[email protected] all
[email protected] Active Class
*/
class RunningCounter extends Counter{}
'>
        
UMLGraph sample with Gravizo
@startuml;

(*) --> if "Some Test" then;

  -->[true] "activity 1";

  if "" then;
    -> "activity 3" as a3;
  else;
    if "Other test" then;
      -left-> "activity 5";
    else;
      --> "activity 6";
    endif;
  endif;

else;

  ->[false] "activity 2";

endif;

a3 --> if "last test" then;
  --> "activity 7";
else;
  -> "activity 8";
endif;

@enduml 
        
UMLGraph sample with Gravizo
@gravizosvg
{
  "svg": {
    "@height": "450",
    "@width": "450",
    "path": [
        { "@id": "lineAB",  "@d": "M 100 350 l 150 -300",
        "@stroke": "red",  "@stroke-width": "3",  "@fill": "none" },
      { "@id": "lineBC",  "@d": "M 250 50 l 150 300",
        "@stroke": "red",  "@stroke-width": "3",  "@fill": "none" },
      { "@d": "M 175 200 l 150 0",  "@stroke": "green",
        "@stroke-width": "3",  "@fill": "none" },
      {  "@d": "M 100 350 q 150 -300 300 0",
        "@stroke": "blue",  "@stroke-width": "5",  "@fill": "none"
      }
    ],
     "g": [
      { "@stroke": "black",  "@stroke-width": "3",  "@fill": "black",
        "circle": [  
            {  "@id": "pointA",  "@cx": "100",  "@cy": "350",  "@r": "3"  },
            {  "@id": "pointB",  "@cx": "250",  "@cy": "50",  "@r": "3"  },
          {   "@id": "pointC",   "@cx": "400",  "@cy": "350",  "@r": "3"  }
        ]
      },
      {
        "@font-size": "30",  "@font-family": "sans-serif", "@fill": "black",
        "@stroke": "none",  "@text-anchor": "middle",
        "text": [
            { "@x": "100",  "@y": "350",  "@dx": "-30",  "$": "A" },
            { "@x": "250",  "@y": "50",   "@dy": "-10",   "$": "B" },
            { "@x": "400",  "@y": "350", "@dx": "30",  "$": "C" }
        ]
      }
    ]
  }
}
        
SVG sample with Gravizo

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