SCION Implementation Status

The following table attempts to rate SCION's level of conformance to the features described in the SCXML draft specification.

Tag Name	Support Status	Notes
Core Module
scxml	~	@binding is not supported (always "early").
state	✓
transition	✓
parallel	✓
initial	✓
final	~	Does not send final event. Right now, treated like a normal state.
onentry	✓
onexit	✓
history	✓
Executable Content
raise	✓
if	✓
elseif	✓
else	✓
foreach	✓
log	✓	Uses console.log API by default. Can be overridden with a custom function using the "log" option.
Data Model and Data Manipulation
datamodel	✓
data	✓
assign	✓
validate	✗
donedata	✗
content	~	Should work well for JSON and string content. XML content should be included as CDATA.
param	✓
script	✓	Variables declared in the datamodel are exposed as local variables in all scripting contexts.
External Communications Module
send	✓	Local (targetless) send, with and without delay attribute, are supported in node.js and browser environments out-of-the-box. Sending to remote targets is well supported, but a function to manage external communications must be passed in on the options object when the SCION interpreter is intantiated.
cancel	✓	Like <send>, cancel is supported for delayed, targetless send in node.js and browser environments out-of-the-box. Similar to send, to cancel remote send actions, a custom cancel function must be passed in on the options object when the SCION interpreter is instantiated.
invoke	✗
finalize	✗
Additional Requirements
The In() predicate	✓
SCXML Events	✓	Everything works, including event matching based on prefixes and wildcard ("*") events.
System Variables	~
The Internal Structure of Events	✓