POSC Specifications
Epicentre Standard Values

Summary of Changes to Standard Values

This is a summary of the changes to the POSC standard instance data which occurred between V2.2.3 and V3.0. With the exception of coordinate system data, most of the changes were made as a response to changes in the logical model. The coordinate system data reflects the EPSG V5.1 data which includes model changes plus value additions.

Global Changes

  • Attributes ref_naming_system or classification_system were changed to naming_system.
  • Attributes name or kind were changed to identifier.
  • Entity Ref_source was dropped in favor of using a string value for attribute source. Attribute source was moved up to E_and_p_data so that all instances can have a source (i.e., data provider).
  • Entity Ref_source_reference was dropped in favor of a string value for attribute source_reference.
  • Attribute source_content was added to capture the original source of the data. Thus POSC can be the source (data provider) of data which has a source_content (content definition) of EPSG and a source_reference (bibliography) of "Topography Department; National Technical University of Athens".
  • Additional changes which affect many entities:

  • Classes may be defined within a parent-child specialization hierarchy. This is in addition to class-classification.
  • All instances can have a naming system, including Ref_code.
  • Dropped instances

    The values for these entities were not moved from V2.2.

  • document_spec_class_classification (renamed)
  • geochronologic_age
  • geochronologic_subepoch
  • geopolitical_association
  • ref_code_alias (renamed)
  • ref_contract_clause
  • ref_coordinate_transform_constraint
  • ref_coordinate_transformation
  • ref_injection_or_production
  • ref_land_right_retention_class
  • ref_logging_direction
  • ref_map_projection
  • ref_object_intersection (replaced by ndt_spatial_predicate)
  • ref_shell_region_binding (replaced by ndt_spatial_binding_type)
  • ref_source
  • ref_source_reference
  • ref_tubular_classification (not used)
  • ref_well_surface_feature_role
  • typical_document_specification
  • typical_geologic_process (renamed)
  • vertical_datum_offset (handled by transformation)
  • New Concepts

  • concatenated_transformation
  • geodetic_zone
  • (from EPSG)
  • ref_entity
  • ref_geometrical_relationship
  • ref_location_status
  • ref_vertical_datum
  • transformation_path
  • Replacement

    Replacement for a pre-existing many-to-many relationship.

  • axis_type_alternative
  • coordinate_axis_constraint
  • property_set_composition
  • quantity_type_alternative
  • temporal_period_period_bndry
  • transformation_earth_usage
  • Renamed Entity

    The entity was renamed for various reasons but the semantics did not change. In some cases the semantics expanded.

    From To
    coordinate_system_alias technical_reference_alias
    coordinate_transformation_method transformation_method
    coordinate_transformation_parameter transformation_parameter_usage
    coordinate_transformation_value transformation_parameter_value
    earth_surface_feature_alias earth_feature_alias
    geographic_coordinate_system geographic_2d_coord_system
    projected_coordinate_system projected_2d_coordinate_system
    ref_business_associate_land_feature_role ref_business_assoc_earth_ftr
    ref_business_associate_facility_role ref_business_assoc_fcl_role
    ref_business_associate_activity_role ref_activity_involvement_role
    ref_coordinate_system_constraint ref_coordinate_sys_constraint
    ref_coordinate_transformation_parameter transformation_parameter
    ref_epicentre_version ref_version
    ref_hydrocarbon_fluorescence_color ref_hydrocarbon_fluor_color
    ref_naming_system naming_system
    ref_quantity_property property_kind
    ref_relative_permeability_model ref_rel_perm_model
    ref_relative_permeability_orientation ref_rel_perm_orientation
    ref_relative_permeability_usage ref_rel_perm_usage
    ref_surface_right ref_license_right
    ref_unit_of_measure_si_conversion ref_uom_si_conversion
    ref_wavelet_or_filter_algorithm ref_wavelet_filter_algorithm
    ref_well_participation_geometry ref_well_participation_geom
    ref_wellbore_component_facility_con ref_wellbore_cmpnt_fcl_conn
    seismic_feature_class seismic_pick_class
    well_log_trace_class_classification well_log_trace_class_clsn

    Move Instances

    The entity was not dropped but its instances were moved to another entity.

    From Entity Instances Moved To
    coordinate_transformation was made abstract.
    map_projection,
    concatenated_transformation and
    single_transformation
    local_spatial_coordinate_system (renamed) vertical_coordinate_system
    ref_geologic_object_association (renamed) ref_geometrical_relationship
    typical_facility facility_class

    Drop and Move

    These entities were dropped and the instances were moved to another entity.

    Dropped Entity Instances Moved To
    applied_coordinate_transformation
    map_projection,
    concatenated_transformation and
    single_transformation
    chemical_element_type material_class
    classification_system naming_system
    ellipsoid_alias technical_reference_alias
    equipment_class material_class
    equipment_class_classification material_class_classification
    fossil_taxon material_class
    general_coordinate_system_axis coordinate_system_axis
    geochronologic_eon temporal_period
    geochronologic_epoch temporal_period
    geochronologic_era temporal_period
    geochronologic_period temporal_period
    geodetic_datum_alias technical_reference_alias
    geoid vertical_datum
    gravel_type material_class
    hole_class material_class
    isotope_type material_class
    measured_depth_system_axis coordinate_system_axis
    mineral_type material_class
    molecule_type material_class
    oil_based_mud_type material_class
    ref_binset_geometry_class earth_feature_class
    ref_classification_system naming_system
    ref_completion_status facility_class
    ref_contract_status document_specification_class
    ref_core material_class
    ref_descriptive_property property_kind
    ref_biozone temporal_period
    ref_fault_side ref_geometrical_relationship
    ref_field earth_feature_class
    ref_geographic_feature earth_feature_class
    ref_geologic_fault earth_feature_class
    ref_geologic_object_association ref_geometrical_relationship
    ref_kind_descriptor property_kind (as part of the identifier)
    ref_product_flow_network_group facility_class
    ref_property_kind property_kind (as part of the identifier)
    ref_property_qualifier property_kind (as part of the identifier)
    ref_seismic_acquisition_vertex earth_feature_class
    ref_seismic_facility_role facility_class
    ref_seismic_geometry earth_feature_class
    ref_survey_environment earth_feature_class
    ref_taxonomic_class material_class
    ref_vertical_axis_orientation ref_axis_orientation
    ref_well_status facility_class
    ref_well_structure_rule facility_class
    ref_wellbore facility_class
    ref_wellbore_point facility_class
    ref_wellbore_purpose facility_class
    ref_wellbore_status facility_class
    ref_wellbore_trajectory_shape facility_class
    solid_additive_type material_class
    solid_organic_matter_type material_class
    solids_free_fluid_type material_class
    vertical_depth_system_axis coordinate_system_axis
    vertical_reference_datum vertical_datum
    water_based_mud_type material_class
    well_log_trace_class_alias technical_reference_alias
    well_log_trace_class_alias
    well_log_trace_mnemonic,
    The concept of alias is retained in technical_reference_alias.

    New Values

    These files contain a value which is flagged as being added in version "epicentre 3.0".

  • activity_class
  • axis_type_alternative
  • concatenated_transformation
  • coordinate_axis_constraint
  • coordinate_system_axis
  • earth_feature_class
  • ellipsoid
  • facility_class
  • geodetic_datum
  • geodetic_zone
  • geographic_2d_coord_system
  • map_projection
  • material_class
  • material_class_classification
  • naming_system
  • prime_meridian
  • projected_2d_coordinate_system
  • property_kind
  • property_set_composition
  • quantity_type_alternative
  • ref_activity_involvement_role
  • ref_axis_orientation
  • ref_customary_unit_of_measure
  • ref_entity
  • ref_location_status
  • ref_parameter_attribute
  • ref_property_set
  • ref_quantity_type
  • ref_uom_si_conversion
  • ref_version
  • ref_vertical_datum
  • ref_wave_polarization
  • single_transformation
  • technical_reference_alias
  • temporal_period
  • transformation_earth_usage
  • transformation_method
  • transformation_parameter
  • transformation_parameter_usage
  • transformation_parameter_value
  • transformation_path
  • uncertainty_class
  • vertical_coordinate_system
  • vertical_datum
  • well_log_trace_class
  • well_log_trace_mnemonic
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