The Imixs-BPMN Event Element

The Imixs-BPMN Event element is an extension to the BPMN 2.0 Intermediate Catch Event. This element describes the transition from one Task into another. The Event Element contains various properties which are evaluated during the execution by the Imixs-Workflow engine.

The properties of an Imixs-BPMN event element are grouped into different sections:

General Properties

In the section General you provide basic information for the Imixs-BPMN Event element.


The name of an event is used to identify the event by the user to process a WorkItem. The name is typically a noun describing the action triggered by the user, e.g. “submit”, “approve” “close”.


The documentation of the Event element is optional and provides the user with additional information about the event. Typically the documentation contains information how the event will change the current status of the process instance.

The properties name and documentation can be used by an application to display event based information- e.g. as buttons or hyper links.

Property Type Description
name String name of the event element
documentation String short description

Workflow Properties

In the section Workflow you provides the processing information for an Event. These information are evaluated by the Workflow Engine while a WorkItem is processed


Every Imixs-Event Element assigned to an Imixs Task Element has an unambiguously ID. The Event ID is used by the Workflow Engine to identify the Event. You can also use the ID to trigger an event manually.



The ‘Result’ defines application specific processing information evaluated by the Workflow Engine. These information are evaluated by plugins and applications. See the section ResultPlugin for further information.

The result information is usually an XML fragment containing a structured list of elements.


The section ‘visibility’ defines whether an event is visible to a workflow user or not. The visibility is separated into three levels of visibility.

    Public Events:
    Per default each Imixs-Event is public and visible to all users. If the property ‘Public Event’ is set to ‘No’, the event will not be part of the public event list of an workitem and not be displayed by an application as a click action.

    Restricted Events:
    A ‘Public Event’ can be restricted to a specific group of users depending on the state of a workflow instance. The restriction is based on the ‘Actor Properties’ which are defined by the process properties of the workflow model. If a restriction is set the event is only visible to the workflow user if the userid is listed in one of the Actor Properties. With the restriction feature, the visibility of a workflow event can be configured on a very fine grained level.

    Read Access:
    The ‘Read Access’ property can be used to define a general read permission for a Imixs-Event element. The list can contain any application specific role or userid. If a ‘read access’ is specified the event is only visible to users with the corresponding access role or userid.

Property Type Description
id Integer event identifier which is unique to the associated task element
$readaccess String List optional access restriction to user- or group IDs
workflow.result String application specific processing information
workflow.public Boolean indicates if the event is a public event (true) or hidden for backend processing only (false)
workflow.public_actors String List an optional list of public actors

ACL Properties

The ACL defines the read-, write- and ownership, an actor will be granted for, after processing a WorkItem.

Actors play an essential role within a human-centric workflow system. In Imixs-Workflow the actors can be defined statically by adding user- or group IDs, or the ACL can be dynamically computed based on the properties of a process instance. The dynamic mapping of actors to a workitem property is defined by the process properties of the workflow model.

Note: If the ACL setting is defined on Event level, the ACL settings on the Task Level will be overwritten.

Owner, Read and Write Access:

The ACL of a WorkItem is defined in three different layers.

  • The ‘Owner’ describes the users assigned to the process instance. This setting defines the users task list.

  • The ‘Read Access’ restricts the general access to a process instance. Only users which are assigned to the Read Access can access the process instance. If no read access is defined at all, the process instance is not read restricted.

  • The ‘Write Access’ restricts the write access to a process instance. The Write Access depends on the AccessLevel a user is granted for. If a user is assigned to the role org.imixs.ACCESSLEVEL.AUTHORACCESS and is not listed in the Write Access List, the user is not allowed to update the process instance. Find more details in the security section.

The ACL can be defined either in a static or by a mapping between the properties of the process instance to the ACL definition.

The Static ACL List:

User- or Group IDs added to the ACL have to match the login name and role definitions of the workflow application. Imixs-Workflow defines the following functional roles which can be added to a static ACL definition:


The ACL Mapping:

The ACL Mapping is used to map a property of the process instance to the ACL. The mapping list can be defined by the Process Property Editor.

See also the section security settings for more details about access control of Imixs-Worklow.

Property Type Description
acl.update boolean indicates an ACL update on the event level
acl.owner_list String List a static owner list
acl.owner_list_mapping String List defines the mapping of a workitem property to the owner list
acl.readaccess_list String List the a static read access list
acl.readaccess_list_mapping String List defines the mapping of a workitem property to the read access list
acl.writeaccess_list String List the a static write access list
acl.writeaccess_list_mapping String List defines the mapping of a workitem property to the write access list

History Properties

This history property defines information added by the HistoryPlugin during the processing phase of the imixs-workflow engine.

For each event processed by the Imixs-Workflow engine a new history entry will be added into the WorkItem. The history is a user-friendly process documentation like in the following example:

02.10.2006 13:36:47 : Document saved by Tom.
02.10.2006 13:46:37 : Document assigned by Mark.
02.10.2006 13:36:47 : Document saved by Anna.

A history entry support the Text Replacer feature.

Document saved by <itemvalue>namcurrenteditor</itemvalue>
Property Type Description
history.message String History message definition

Mail Properties

The property section ‘Mail’ defines information for mail messaging during a process step.

A mail message is defined by the mail subject and mail body. Both fields support the Text Replacer feature. A mail message can define different recipients in the sections ‘To’, ‘CC’ and ‘BCC’. See the section Process Property Editor for more information how to define Actors in an Imixs BPMN model.

A Mail message can be send by the Imxis-Mail Plugin

Property Type Description
mail.subject String the message subject
mail.body String the message body
mail.to_list String List a static recipient list
mail.to_list_mapping String List defines the mapping of a workitem property to the recipient list
mail.cc_list String List a static CC recipient list
mail.cc_list_mapping String List defines the mapping of a workitem property to the CC recipient list
mail.bcc_list String List a static BCC recipient list
mail.bcc_list_mapping String List defines the mapping of a workitem property to the BCC recipient list

Rule Properties

In the section ‘Rule’ you can define business rules to be evaluated during the processing life cycle.

A business rule can be written in different script languages. See the section Rule Plugin for further information how a business rule is defined.

Property Type Description
rule.engine String rule engine (default is JavaScript)
rule.definition String rule definition

Report Properties

The ‘Report’ section describes a report definition to be executed the event.

See the section Rule Plugin for further information about reports.

Property Type Description String report name
report.path String optional file path
report.options String List optional param list list String target definition (0=attach, 2=file)

Version Properties

The section ‘Version’ defines if a new version of a process instance should be created by the event. Versions are used to archive a process instance or to create a copy of a workitem.

See the section Version Plugin for further information about reports.

Property Type Description
version.mode String mode option (1=create new, 2=convert to master)
version.event Integer event id

Timer Properties

Events can be triggered by user interaction or based on a timer event. The section ‘timer’ allows the definition of a timer event.

See the section Workflow Scheduler for further information.

Property Type Description Boolean true if the event is a timer event
timer.selection String optional view selection (lucene query)
timer.delay Integer delay
timer.delay_unit String delay unit (0=seconds, 1=minutes, 2=hours, 3=days, 4=working days)
timer.delay_base String delay base (1=last event, 2=last modify, 3=creation date, 4=workitem property)
timer.delay_base_property String name of workitem base property