SameTestProperties
is an option for set operations on entity classes whose setting gives the properties that are used to decide whether two given entities are the same.
Details
- The default setting of SameTestProperties is Automatic. This means that equality between entities is defined as equality between Entity expressions as returned by EntityList with a single argument.
- SameTestProperties{{prop11,prop12,…},{prop21,prop22,…},…} means that propiα in classi has to be equal to all propjα in classj.
- In UnionedEntityClass[…,SameTestPropertiesFalse], no two entities are ever considered the same. The classes are effectively joined to one another.
Examples
open all close allBasic Examples (4)
The default setting of Automatic compares Entity expressions:
With the default setting, different entity types are always considered to be different:
A movie and a book can be considered the same if they have the same "Name" property:
In UnionedEntityClass, you can set SameTestProperties to False to keep duplicate entries:
Scope (1)
SameTestProperties is supported on SQL-backed entity stores:
Properties & Relations (1)
SameTestProperties could be simulated less efficiently using SameTest:
However, the resulting entities will have the type of the first class, and because of that, only the properties of the first type:
Text
Wolfram Research (2020), SameTestProperties, Wolfram Language function, https://reference.wolfram.com/language/ref/SameTestProperties.html.
CMS
Wolfram Language. 2020. "SameTestProperties." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/SameTestProperties.html.
APA
Wolfram Language. (2020). SameTestProperties. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/SameTestProperties.html