The utilization of a property variable as an axis by a coordinate system.
instance_s (PK, M: CHAR VARYING(19))
Surrogate key of the table.
abbreviation (M: CHAR VARYING(15))
coordinate_system_axis.abbreviation
This is a short name which is commonly used for this axis. These are generally names such as "x", "y", "X", "Y", "N", "E", "Lat", "Long", etc. This may or may not be an abbreviation of the property kind.
axis_order (M: INTEGER)
coordinate_system_axis.axis_order
This is the order of the axis within the definition of the coordinate system. This order should match the "normal" order assumed for the coordinate system. For exporting tuples of data, this would be the normal order of coordinates within the tuple. Note that the data base is somewhat independent of order because the order is explicit and not assumed. The only place that this order is used is in the LIST associated with data type LOCATION, in the LIST of axis types associated with the coordinate system constraint and in the determination of the right/left handed orientation of the coordinate system. The first axis should have an axis order of one, the second an order of two, etc.
instance_create_date (O: TIMESTAMP)
e_and_p_data.instance_create_date
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.
last_updated (O: TIMESTAMP)
e_and_p_data.last_updated
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).
coordinate_system_s (FSK, M: CHAR VARYING(19))
coordinate_system_axis.coordinate_system
This is a coordinate system axis that is part of a coordinate system. The axis is ordered within the context of the coordinate system. An axis may not be used more than once in a coordinate system.
Defines a foreign key to table coordinate_system.
e_and_p_data.description
A remark or comment about the instance.
instance_creator (O: CHAR VARYING(80))
e_and_p_data.instance_creator
This is the person, company or application that created this instance. This identifies the party responsible for loading this instance.
last_updated_by (O: CHAR VARYING(80))
e_and_p_data.last_updated_by
This records the person or application making the update to this instance.
source (O: CHAR VARYING(80))
e_and_p_data.source
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".
source_content (O: CHAR VARYING(80))
association_reference.source_content
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).
source_reference (O: CHAR VARYING(2000))
association_reference.source_reference
The reference used by source to provide the standard instance, such as Petroleum Industry Data Dictionary (PIDD), Websters Ninth New Collegiate Dictionary, etc.
status (O: CHAR VARYING(11))
association_reference.status
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.
constrained_to_unit (FNK, O: CHAR VARYING(15))
coordinate_system_axis.constrained_to_unit
This asserts that an axis is constrained to one unit of measure. Note that this is redundant to the constraints on ref_quantity_type.
Defines a foreign key to table r_unit_of_measure.
r_axis_orientation (FNK, O: CHAR VARYING(80))
coordinate_system_axis.ref_axis_orientation
The orientation of the positive direction of the coordinate system axis. The orientations may be absolute in an Earth sense or be relative to other axes. For example, "east", "west", "north", "south", "upward", "downward", "right handed" and "left handed". Note that a 3D system with axis orientations of north/east/upward inherently defines a left-handed coordinate system (or from an alternative viewpoint, a left-handed third axis).
Defines a foreign key to table r_axis_orientation.
version_s (FSK, O: CHAR VARYING(19))
association_reference.version
This describes the version of this instance as defined by the provider.
Defines a foreign key to table r_version.