POSC Specifications: Epicentre Version 3.0 | Logical Data Model |
This defines the activities contained by a schedule. The relative times of activities resulting from resolving the schedule are optionally defined with respect to another activity in the schedule using relative offset.
- schedule (M, K: schedule(schedule_activity))
- Indicates the schedule in which the activity is being described. Each schedule_activity must be contained by one schedule.
- activity (M, K: activity(schedule_activity))
- Specifies this activity as being part of a schedule. Each schedule_activity must specify one activity.
- description (O, I: ndt_comment) (C117)
- A remark or comment about the instance. Inherited from e_and_p_data.
- instance_create_date (O, I: ndt_date_tod) (C126)
- This is the date that this instance was created. This date is defined by the source if imported, or is the date the instance is created if a new instance. Inherited from e_and_p_data.
- instance_creator (O, I: ndt_identifier) (C126)
- This is the person, company or application that created this instance. This identifies the party responsible for loading this instance. Inherited from e_and_p_data.
- last_updated (O, I: ndt_date_tod) (C126)
- This is the date that this instance was last updated. This value should be updated when any part of this instance is altered (except for inverse relationships). Inherited from e_and_p_data.
- last_updated_by (O, I: ndt_identifier) (C126)
- This records the person or application making the update to this instance. Inherited from e_and_p_data.
- relative_time (O: ndt_time)
- The relative offset of the start time of the scheduled activity from the start time of the "relative to" schedule activity. Positive offsets are interpreted as meaning later in time.
- scheduled_cost (O: ndt_money)
- The cost of an activity, estimated in the context of the schedule.
- source (O, I: ndt_identifier) (C126)
- The provider of this instance, which is usually a data provider for imported/purchased data. If this instance is provided by POSC, then this attribute must be "POSC". Inherited from e_and_p_data.
- data_collection (I, V: SET[0:?] data_collection_content(collection_part)) (C020)
- Indicates the data collections that include this instance of E and P data. Each schedule_activity may be a member of one or more data_collection_content. Inherited from e_and_p_data.
- document_information_content (I, V: SET[0:?] document_information_content(e_and_p_data)) (C136)
- These are the document specification parts that include this data value and define its meaning within a document specification. Each use may define a different meaning, and many uses are allowed. Each schedule_activity may be included in one or more document_information_content. Inherited from e_and_p_data.
- graphical_element (I, V: SET[0:?] graphical_element(depicted_object))
- Specifies one or more graphical elements which are depicting this data item. Each schedule_activity may be depicted by one or more graphical_element. Inherited from e_and_p_data.
- referenced_by (V: SET[0:?] schedule_activity(relative_to))
- Indicates a set of activity schedules which use this activity schedule as a reference for their scheduled start times. Each schedule_activity may be the reference for one or more schedule_activity.
- relative_to (O: schedule_activity(referenced_by))
- Indicates an activity schedule which acts as a reference for the relative start time of this activity schedule. Each schedule_activity may occur relative to one schedule_activity.
Local rules:
- Uniqueness Constraint
- schedule, activity
- Mandatory Relationship Set
-
A schedule_activity must be related to either a schedule or another schedule_activity.
Supertype path(s):
Referenced in Diagrams:
Generated on Tue Jul 10 15:53:58 2001
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