~~NOCACHE~~
======plantuml======
[[http://plantuml.com|plantuml]]

PlantUML uses a special encoding to transform a uml text description like: 
<uml title="pte">
Alice -> Bob: Authentication Request
Bob --> Alice: Authentication Response
</uml>
into UDfppCbCJbNGjLDmoa-oKd0iBSb8pIl9J4uioSpFKmXABInDBIxXvG9AAkW25Jc2L6DHLboGdrUS2W3B6nef

For example, SyfFKj2rKt3CoKnELR1Io4ZDoSa70000 is the encoded form of:

<uml t="hello">
Bob->Alice : hello
</uml>

<uml>
Alice -> Bob: Authentication Request
Bob  --> Alice: Authentication Response

Alice  -> Bob: Another authentication Request
Alice <-- Bob: another authentication Response
</uml>
<uml title="activity">
(*) --> "First Activity"
        "First Activity" --> (*)
</uml>