Section I – SCXML > SCXML Extensions > SCXML Event Extensions Bottom of Page
| Genesys 8.0 SCXML Technical Reference
< SCXML Element Extensions Object Model >

## SCXML Event Extensions

In addition to the standard properties in all events (see the Events section), the following are the additional attributes that will be added to the SCXML events. They will be accessible via the _event.data variable.

Event Name | Property | Description
--- | --- | ---
error.illegalcond.errortype error.illegalloc.errortype error.illegalvalue.errortype error.illegaldata.errortype error.script.errortype error.unsupported.element error.receive.datamismatch error.send.nosuchsession error.send.datamismatch error.send.ioprocessorerror error.send.targettypeinvalid.stateid error.send.failed error.cancel.notallowed error.illegalassign error.send.noeventspecified | document | This is the URL of the document in which the error occurred. Note: this is important if the application uses `<include>`.
element | This is the name of the element that was being executed when the error occurred.
linenumber | This is the line number of the document where the error occurred.
error.badfetch.protocol.response_code error.send.targetunavailable.stateid | target | This is the target URL which was being used in the element when the error occurred.
document | This is the URL of the document in which the error occurred. Note: this is important if the application uses `<include>`.
element | This is the name of the element that was being executed when the error occurred.
linenumber | This is the line number of the document where the error occurred.
done.state.stateid done.scxml.name done.invoke.invokeid | sessionid | This is the session ID of the session that has ended.
reason | This is the reason the started session has ended.
params | This is the list of parameters that is passed back based on the `<param>` elements defined in the `<donedata>` element in the `<final>` element which is executed while the session is finishing or terminating.

Section I – SCXML > SCXML Extensions > SCXML Event Extensions Top of Page
| Genesys 8.0 SCXML Technical Reference
< SCXML Element Extensions Object Model >