This package is thought to allow people describe how entities interact between each other through language-flow-diagram which was inspired by websequencediagrams. Grammar definition is available at language-flow-diagram page.
Sorry, this is because I need to generate binary file for other platforms. It will come soon anyway.
CF grammar definition can be found below
Currently the package offer
After creating a *.diagram file (diagram extension is mandatory); you can display its preview by selecting it from the menu, like the example below. The path is packages > flow-diagram > Diagram Preview
Export to svg
The flow-diagram package allows multiple export formats like svg.
Export to pdf
The flow-diagram package also allows to export diagrams in pdf format
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.