Intermediate Events
An Intermediate Event represents a point in the process where something occurs after a process starts and before it ends. It affects the flow of the process.
It evaluates conditions and situations that cause events or fulfills conditions that start another process.
Intermediate events can be catching or throwing events.
A catching event waits for an event to occur and reacts to it. A throwing event triggers the event based on the type of event.
An Intermediate Event can have multiple incoming and outgoing Sequence Flows.
When adding an Intermediate Event to your diagram, make sure that:
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It has at least one incoming Sequence Flow.
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It has at least one outgoing Sequence Flow.
Intermediate Events appear as circles with a double edge. The marker changes according to the type of Intermediate Event. Catching event markers are white, throwing event markers are black.
Intermediate Event
An Intermediate Event is a throwing event.
Use it to indicate that something has changed in the process.
Message Intermediate Catch Event
Use a Message Intermediate Catch Event to receive a message. This event pauses the process until it receives a specific message or changes the process flow when the messaged isn’t received.
Message Intermediate Catch Event attributes
Fill in this field in the Attributes tab:
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Message Reference
The ID of the Message that is sent or received by the Task.
Click
to view the list of message IDs and select an ID.
Define this attribute in the Output of the Attributes panel:
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Output
The Data Output sent by the element.
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To add a Data Output, click Add.
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To remove a Data Output, select the Data Output from the list then click Remove.
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To complete or edit a Data Output, select the Data Output from the list and fill in these fields:
Field Description Name The name of the Data Output. Description A description of the Data Output. Item Definition The data type of the Data Output.
Message Intermediate Throw Event
Use a message intermediate throw event to send a message.
Message Intermediate Throw Event attributes
Fill in this field in the Attributes tab:
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Message Reference
The ID of the Message that is sent or received by the Task.
Click
to view the list of message IDs and select an ID.
Define this attribute in the Input tab of the Attributes panel:
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Input
The Data Input received by the element.
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To add a Data Input, click Add.
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To remove a Data Input, select the Data Input from the list then click Remove.
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To complete or edit a Data Input, select the Data Input from the list and fill in these fields:
Field Description Name The name of the input. Description A description of the input. Item Definition The data type of the input. Default value The default value of the input.
Timer Intermediate Catch Event
A Timer Intermediate Catch Event acts like a stopwatch. When the process arrives at this event, a timer starts and the process is paused for a specified time before starting up again.
Timer Intermediate Catch Event attributes
Define this attribute in the Timer tab of the Attributes panel:
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Timer Event Definition
Define the timer conditions for timer events.
Refer to the ISO 8601 standard for date, time and duration format.
To set the Timer Type:
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Click
and select the timer type: Type Description None No timer type specified. Recurring date Repeated on a specific day and time in a cycle — for example, "every Monday at 9am". Fixed date A specific date and time — for example, "31 December 2021". After duration The time from the moment the process reaches the event to the moment the trigger is fired — for example, "5 minutes".
Escalation Intermediate Throw Event
When a process arrives at an Escalation Intermediate Throw Event this triggers an escalation. The escalation can be caught by a Boundary Event or Subprocess with the same Escalation.
Escalation Intermediate Throw Event attributes
Fill in this field in the Attributes tab:
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Escalation Reference
The ID of the Escalation the event is referencing.
Define this attribute in the Input tab of the Attributes panel:
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Input
The Data Input received by the element.
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To add a Data Input, click Add.
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To remove a Data Input, select the Data Input from the list then click Remove.
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To complete or edit a Data Input, select the Data Input from the list and fill in these fields:
Field Description Name The name of the input. Description A description of the input. Item Definition The data type of the input. Default value The default value of the input.
Signal Intermediate Catch Event
Use a Signal Intermediate Catch Event to receive a specific signal. This event pauses the process flow until it receives a signal.
Signal Intermediate Catch Event attributes
Fill in this field in the Attributes tab:
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Signal Reference
The ID of the Signal that’s broadcast.
Click
to select a Signal ID.
Define this attribute in the Output tab of the Attributes panel:
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Output
The Data Output sent by the element.
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To add a Data Output, click Add.
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To remove a Data Output, select the Data Output from the list then click Remove.
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To complete or edit a Data Output, select the Data Output from the list and fill in these fields:
Field Description Name The name of the Data Output. Description A description of the Data Output. Item Definition The data type of the Data Output.
Signal Intermediate Throw Event
Use a Signal Intermediate Throw Event to send a specific signal.
Signal Intermediate Throw Event attributes
Fill in this field in the Attributes tab:
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Signal Reference
The ID of the Signal that’s broadcast.
Click
to select a Signal ID.
Define this attribute in the Input tab of the Attributes panel:
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Input
The Data Input received by the element.
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To add a Data Input, click Add.
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To remove a Data Input, select the Data Input from the list then click Remove.
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To complete or edit a Data Input, select the Data Input from the list and fill in these fields:
Field Description Name The name of the input. Description A description of the input. Item Definition The data type of the input. Default value The default value of the input.
Conditional Intermediate Catch Event
Use a Conditional Intermediate Catch Event to trigger an event when a given condition evaluates to true. It pauses the process flow until the condition is fulfilled.
Conditional Intermediate Catch Event attributes
Fill in this field in the Attributes tab:
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Add condition
Select the type of condition:
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None: No condition defined.
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Binary: Define a condition expression by comparing two Data Elements or values.
Operands are the two Data Elements/values you want to compare. Operator is the comparison operator you use.
Fill in these fields:
Field Description First operand Click to select a Data Element. Operator Click to select an operator. Second operand Select a Data Element or insert a value. 
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Free: Define a condition according to your requirements. There are no limitations on the language or expression. This condition is not executable.
Fill in these fields:
Field Description Language There is no default language. Use the language you prefer. Expression Boolean type expression. The condition must evaluate to true.
Define this attribute in the Output tab of the Attributes panel:
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Output
The Data Output sent by the element.
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To add a Data Output, click Add.
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To remove a Data Output, select the Data Output from the list then click Remove.
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To complete or edit a Data Output, select the Data Output from the list and fill in these fields:
Field Description Name The name of the Data Output. Description A description of the Data Output. Item Definition The data type of the Data Output.
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