Databases Reference
In-Depth Information
assert
Mechanics:
to place a row in an asserted version table in current assertion time.
Semantics:
to claim that a row in an asserted version table makes a true and/or
actionable statement.
Components:
actionable, asserted version table, current assertion, statement.
asserted version table
Mechanics:
a bi-temporal table in which each row can exist in past, present or
future assertion time, and also in past, present or future effective time.
Semantics:
a table each of whose rows indicates when the object it represents is
as its business data describes it, and when that row is claimed to make a true
and/or actionable statement about that object.
Comments:
In contrast, rows in bi-temporal tables of the standard temporal model
cannot exist in future assertion time.
Also, a table whose structure conforms to the schema presented in
Chapter 6. See also:
bi-temporal data canonical form
.
Components:
actionable, assertion time, bi-temporal table, business data,
effective time, object, statement, the standard temporal model.
Asserted Versioning database
Mechanics:
a database that contains at least one asserted version table.
Components:
asserted version table.
Asserted Versioning Framework
Mechanics:
software which (i) generates asserted version tables from logical
data models and associated metadata; (ii) enforces temporal entity
integrity and temporal referential integrity constraints as asserted version
tables are maintained; (iii) translates temporal insert, update and delete
transactions into the physical transactions which maintain an asserted
version table; and (iv) internalizes pipeline datasets.
Comments:
The Asserted Versioning Framework is software developed by the authors
which implements Asserted Versioning.
Components:
asserted version table, internalization of pipeline datasets,
physical transaction, temporal data management, temporal entity integrity,
temporal referential integrity, temporal transaction.
assertion
Mechanics:
the temporally delimited claim that a row in an asserted version
table makes a true and/or actionable statement about what the object it
represents is like during the time period designated by that version of that
object.
Semantics:
the claim that a statement is true and/or actionable.
Components:
actionable, asserted version table, object, represent, statement, time
period, version.
assertion approval date
Mechanics:
the new assertion begin date which an approval transaction specifies
for the assertions in a deferred assertion group.
Semantics:
the near future assertion time date to which all assertions in a
deferred assertion group are to be retrograde moved.
Components:
approval transaction, assertion, assertion begin date, deferred
assertion group, near future assertion time, retrograde movement.
