POSC Specifications: Epicentre Version 3.0 | Logical Data Model |
A mathematical surface defined by revolving an ellipse around its minor (polar) axis and which approximates the surface of the earth without its topographic undulations.
- identifier (M, K, I: ndt_identifier) (C025)
- The name of the instance. Inherited from technical_reference.
- semimajor_axis (M: ndt_accurate_length) (C148)
- Semimajor ellipsoid axis length, a.
- 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.
- inverse_flattening (O: ndt_real4)
- The inverse of flattening. Inverse flattening may be calculated as the length of the semimajor axis over the difference in lengths of the semimajor and semiminor axes: 1/f=a/(a-b), where 1/f is the inverse flattening, a is the length of the semimajor axis, and b is the length of the semiminor axis.
- 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.
- semiminor_axis (O: ndt_accurate_length)
- Semiminor ellipsoid axis length, b.
- 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.
- source_content (O, I: ndt_identifier) (C126)
- This is the original source of the data. This is the person, company or application that defined or specified the data (content) for this instance and is considered to be responsible for it. For example, POSC, EPSG, API, ISO, etc. This may be the same as or different from the provider of the instance (e.g., POSC). Inherited from technical_reference.
- source_reference (O, I: ndt_comment) (C042, C126)
- The reference used by source to provide the standard instance, such as Petroleum Industry Data Dictionary (PIDD), Websters Ninth New Collegiate Dictionary, etc. Inherited from technical_reference.
- status (O, I: ndt_instance_status) (C042)
- The status of this instance in the version of Epicentre running in a data store. This is an enumerated datatype for which the following are the possible values: current, provisional, deprecated. Current - use without restriction. Provisional - use with caution, this value is for comment and may not appear in future releases of Epicentre. Deprecated - avoid use if possible, it is planned to remove this value in the next major release of Epicentre. Inherited from technical_reference.
- 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 ellipsoid may be a member of one or more data_collection_content. Inherited from e_and_p_data.
- derived_interest (I, V: SET[0:?] derived_interest_makeup(interest_for)) (C071, C122)
- These are the ownership fractions for business associates of this object. Each ellipsoid may be referenced by one or more derived_interest_makeup. Inherited from object_of_interest.
- 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 ellipsoid may be included in one or more document_information_content. Inherited from e_and_p_data.
- geodetic_datum (V: SET[0:?] geodetic_datum(ellipsoid))
- These are the geodetic datums that are defined as using this ellipsoid. This ellipsoid, when properly positioned, defines the surface of these geodetic datums. Each ellipsoid may be used to define one or more geodetic_datum.
- graphical_element (I, V: SET[0:?] graphical_element(depicted_object))
- Specifies one or more graphical elements which are depicting this data item. Each ellipsoid may be depicted by one or more graphical_element. Inherited from e_and_p_data.
- involving_activity (I, V: SET[0:?] object_activity_involvement(involved_object)) (C056)
- This are the activity involvements which affect the object. Each ellipsoid may have involvements with one or more object_activity_involvement. Inherited from object_of_interest.
- naming_system (O, I: naming_system(aliasable_technical_reference)) (C028)
- The naming system in which the identifier is specified and determined to be unique. Each ellipsoid may have name specified by one naming_system. Inherited from aliasable_technical_reference.
- technical_reference_alias (I, V: SET[0:?] technical_reference_alias(aliased_object)) (C029)
- Indicates the various identifiers by which this instance is known. Each ellipsoid may be known by one or more technical_reference_alias. Inherited from aliasable_technical_reference.
- version (O, I: ref_version(technical_reference)) (C042, C126)
- This describes the version of this instance as defined by the provider. Each ellipsoid may version one ref_version. Inherited from technical_reference.
Local rules:
Supertype path(s):
Entity projects as table ELLIPSOID.
Referenced in Diagrams:
Generated on Tue Jul 10 15:41:32 2001
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