A promise that resolves to the current update. If any modifications made by
the methods above have affected the @insert and @delete of the update,
they will have been applied.
Substitutes the given alias for the given property or subject and property, in updates provided to the application. This allows a constraint to hide a data implementation detail.
the subject to which the alias applies
the property to be aliased
the alias for the given property
Substitutes the given alias for the given subject, in updates provided to the application. This allows a constraint to hide a data implementation detail.
the subject to which the alias applies
@id to indicate that the subject IRI is aliased
the alias for the given subject
An assertion is an update that maintains the data integrity of the domain by changing data that the app created, or that was the result of a prior assertion.
An assertion is incorporated into the final update sent to other clones and echoed to the local app. Examples of assertions:
the update to assert into the domain
An entailment is an update that maintains the data integrity of a domain by changing only entailed data. Entailed data is data that can be deduced automatically, and can only be created by entailment, and not by an app.
An entailment is not included in updates sent to other clones or to the local app. Examples of entailments:
Note that graph edges that are deleted by entailments retain a hidden presence in the clone metadata, commonly known as a 'tombstone'. Since this can give rise to unbounded storage use, constraints should endeavour to remove these hidden graph edges when the opportunity arises. They can be obtained using the {@link #hidden} method.
the update to entail into the domain
Recovers hidden graph edges for the given subject and property; that is, values that have been deleted from the graph by entailment. Hidden edges can be removed permanently by asserting their deletion.
the subject for which to obtain the graph edge
the property for which to obtain the graph edge
Removes assertions (not entailments) from this update, prior to application to the dataset. This is used to rewrite assertions made by the application, or the work of prior constraints.
Removal of an assertion is possible:
Subject assertions to remove
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An update to which further updates can be asserted or entailed.