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IntersectedEntityClass
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IntersectedEntityClass

[Experimental]

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IntersectedEntityClass[class1,class2,…]

represents an entity class containing all the entities common to all classi.

Details and Options

  • IntersectedEntityClass[class1,class2,…] is effectively equivalent to the unsorted intersection of the entities in each classi as they appear when applying EntityList.
  • When the classes appearing in IntersectedEntityClass effectively have the same type after the simplification in EntityList, the resulting entities will have that type. When performing the intersection of incompatible types, the resulting entities will have a new type.
  • IntersectedEntityClass[class1,class2,…,SameTestProperties {props1,props2,…}] uses properties propsi from classi to test for entity equality.
  • EntityProperties[IntersectedEntityClass[class1,class2,…]] returns all the properties of each classi, along with EntityProperty[IntersectedEntityClass[…],"propj"], where "propj" are any of the properties that appear in at least two of the classi when those classes have different entity types.

Examples

open allclose all

Basic Examples  (3)Summary of the most common use cases

Compute the complement of two entity classes:

In[1]:=1
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https://wolfram.com/xid/0b7feoouzx8rx9b2-yhnw3p
Out[1]=1

Mixing different entity types will effectively result in an empty entity class:

In[1]:=1
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https://wolfram.com/xid/0b7feoouzx8rx9b2-dw4zda
Out[1]=1

Redefining equality by name yields the correct result:

In[2]:=2
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https://wolfram.com/xid/0b7feoouzx8rx9b2-61smtn
Out[2]=2

When used with relational-database-backed entities, IntersectedEntityClass corresponds to an INTERSECT statement:

In[1]:=1
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https://wolfram.com/xid/0b7feoouzx8rx9b2-35ca2e
Out[1]=1
In[2]:=2
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https://wolfram.com/xid/0b7feoouzx8rx9b2-q81531
Out[2]=2

Scope  (2)Survey of the scope of standard use cases

Use IntersectedEntityClass with entity classes of the same type:

In[1]:=1
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https://wolfram.com/xid/0b7feoouzx8rx9b2-65i6fa
Out[1]=1

Entities of different types are considered different by default:

In[1]:=1
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https://wolfram.com/xid/0b7feoouzx8rx9b2-iaqrm5
Out[1]=1

Use SameTestProperties to match them by name:

In[2]:=2
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https://wolfram.com/xid/0b7feoouzx8rx9b2-uuw1e8
Out[2]=2

Options  (1)Common values & functionality for each option

SameTestProperties  (1)

SameTestProperties can be used to define equality between entities:

In[1]:=1
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https://wolfram.com/xid/0b7feoouzx8rx9b2-ldfv06
Out[1]=1

Properties & Relations  (2)Properties of the function, and connections to other functions

IntersectedEntityClass is usually equivalent to Intersection

In[1]:=1
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https://wolfram.com/xid/0b7feoouzx8rx9b2-bddh7m
Out[1]=1

When performing the intersection of implicit EntityClass or FilteredEntityClass expressions, it is often more efficient to use conjunction in the condition:

In[1]:=1
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https://wolfram.com/xid/0b7feoouzx8rx9b2-56725k
Out[1]=1

The resulting classes are equivalent apart from ordering:

In[2]:=2
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https://wolfram.com/xid/0b7feoouzx8rx9b2-nuo5xd
Out[2]=2
Wolfram Research (2020), IntersectedEntityClass, Wolfram Language function, https://reference.wolfram.com/language/ref/IntersectedEntityClass.html.
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Wolfram Research (2020), IntersectedEntityClass, Wolfram Language function, https://reference.wolfram.com/language/ref/IntersectedEntityClass.html.

Text

Wolfram Research (2020), IntersectedEntityClass, Wolfram Language function, https://reference.wolfram.com/language/ref/IntersectedEntityClass.html.

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Wolfram Research (2020), IntersectedEntityClass, Wolfram Language function, https://reference.wolfram.com/language/ref/IntersectedEntityClass.html.

CMS

Wolfram Language. 2020. "IntersectedEntityClass." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/IntersectedEntityClass.html.

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Wolfram Language. 2020. "IntersectedEntityClass." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/IntersectedEntityClass.html.

APA

Wolfram Language. (2020). IntersectedEntityClass. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/IntersectedEntityClass.html

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Wolfram Language. (2020). IntersectedEntityClass. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/IntersectedEntityClass.html

BibTeX

@misc{reference.wolfram_2025_intersectedentityclass, author="Wolfram Research", title="{IntersectedEntityClass}", year="2020", howpublished="\url{https://reference.wolfram.com/language/ref/IntersectedEntityClass.html}", note=[Accessed: 12-May-2025 ]}

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@misc{reference.wolfram_2025_intersectedentityclass, author="Wolfram Research", title="{IntersectedEntityClass}", year="2020", howpublished="\url{https://reference.wolfram.com/language/ref/IntersectedEntityClass.html}", note=[Accessed: 12-May-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_intersectedentityclass, organization={Wolfram Research}, title={IntersectedEntityClass}, year={2020}, url={https://reference.wolfram.com/language/ref/IntersectedEntityClass.html}, note=[Accessed: 12-May-2025 ]}

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@online{reference.wolfram_2025_intersectedentityclass, organization={Wolfram Research}, title={IntersectedEntityClass}, year={2020}, url={https://reference.wolfram.com/language/ref/IntersectedEntityClass.html}, note=[Accessed: 12-May-2025 ]}