POSC Specifications: Epicentre Version 3.0 | Logical Data Model |
Defines the nominal offset between the source and selected receivers along an "assumed straight" cable.
- seismic_geometry_set (O, K: seismic_geometry_set(pty_nominal_offset))
- Each pty_nominal_offset may be a property of one seismic_geometry_set.
- activity (O, K, I: activity(process_data))
- Defines the activity which created this instance. Each pty_nominal_offset may be the result of one activity. Inherited from process_data.
- description (O, I: ndt_comment) (C117)
- A remark or comment about the instance. Inherited from e_and_p_data.
- downline_far_offset (O: ndt_length)
- The nominal horizontal distance (assuming a straight cable) from a source facility to the far receiver facility in the direction of increasing acquisition indexes.
- downline_near_offset (O: ndt_length)
- The nominal horizontal distance (assuming a straight cable) from a source facility to the near receiver facility in the direction of increasing acquisition indexes.
- 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.
- preferred_flag (O, I: ndt_boolean)
- The flag is set to True if this instance of property is the preferred value in this data store of this type of property for the object which this property describes. Inherited from property.
- 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.
- upline_far_offset (O: ndt_length)
- The nominal horizontal distance (assuming a straight cable) from a source facility to the far receiver facility in the direction of decreasing acquisition indexes.
- upline_near_offset (O: ndt_length)
- The nominal horizontal distance (assuming a straight cable) from a source facility to the near receiver facility in the direction of decreasing acquisition indexes.
- 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 pty_nominal_offset 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 pty_nominal_offset 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 pty_nominal_offset may be depicted by one or more graphical_element. Inherited from e_and_p_data.
- process_data_item (I, V: SET[0:?] process_data_item(process_data))
- Defines where this data was used by an activity. Each pty_nominal_offset may be the value for one or more process_data_item. Inherited from process_data.
- represent (O, I: property(representations)) (C125)
- This is the property that is the original for which this representation is an equivalent representation. Each pty_nominal_offset may be an equivalent representation of one property. Inherited from property.
- representations (I, V: SET[0:?] property(represent)) (C125)
- This designates other properties that are stated to be equivalent representations of this property representation, such as the same geometry using another coordinate system. Each pty_nominal_offset may have as equivalent representations one or more property. Inherited from property.
Local rules:
- Uniqueness Constraint (C010)
- seismic_geometry_set, activity
- [I: property] Mandatory Relationship Set
-
Each PROPERTY must "be a property of" one object.
- Instance Value Constraint
-
Each instance must define at least one of DOWNLINE FAR OFFSET, DOWNLINE NEAR OFF ST, UPLINE FAR OFFSET and UPLINE NEAR OFFSET.
Supertype path(s):
Generated on Tue Jul 10 15:49:20 2001
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