Code identifying the task or activity or event type
Type
ID
Length
Max 2 / Min 2
Codes
<> 01
Beginning Activity
<> 02
Ending Activity
<> 03
Activity
<> 04
Interface Activity (when 2 or more separate networks are combined to create 1 network)
<> 05
Summary Activity
<> 06
Milestone
<> 07
Event
<> 08
Constraint - Finish to Start
<> 09
Constraint - Start to Finish
<> 10
Constraint - Finish to Finish
<> 11
Constraint - Start to Start
<> 12
Constraint - Dummy
<> 20
Cost Account Activity
<> 21
Work Package Activity
<> 22
Data Item
<> PI
Maintenance Period Identifier
<> PM
Proposed Maintenance Action
<> SM
Scheduled Maintenance Action
<> ZZ
Mutually Defined
