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PropertyList[{obj,itemspec}]

lists the properties available for itemspec in obj.

Details
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Examples  
Basic Examples  
Scope  
Properties & Relations  
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PropertyList

As of Version 12.1, PropertyList has been superseded by AnnotationKeys.

PropertyList[{obj,itemspec}]

lists the properties available for itemspec in obj.

Details

  • Properties are used to store and manipulate name->value pairs for specific named items within an object such as Graph, MeshRegion, and BoundaryMeshRegion.
  • The item specification itemspec typically has the form {collection,index}.
  • The index can typically have the following forms:
  • inda single index
    {ind1,ind2,…}a list of indexes
    Allall possible indexes in collection
    pattindexes that match patt in collection
  • The collection can typically have the following forms:
  • cola single collection
    {col1,col2,…}a list of collections
    Allall possible collections
    pattcollections that match patt
  • The item specification itemspec of the form collection refers to the default value for all indexes in the collection.
  • For an item specification itemspec that refers to more than a single item, PropertyList will give the union of properties for the different items.
  • Objects that support properties include Graph, MeshRegion, and BoundaryMeshRegion. Item specifications for each type of object is given in their reference pages.

Examples

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Basic Examples  (2)

Get a list of standard properties for a vertex:

Wolfram Language code: g = CompleteGraph[4]
Wolfram Language code: PropertyList[{g, 1}]

For an edge:

Wolfram Language code: PropertyList[{g, 12}]

Test for the presence of custom properties:

Wolfram Language code: Graph[{Property[1, "Material" -> "Wood"], 2, 3}, {12, 23, 31}]
Wolfram Language code: {MemberQ[PropertyList[{%, 1}], "Material"], MemberQ[PropertyList[{%, 1}], "Taste"]}

Scope  (1)

PropertyList applies to vertices:

Wolfram Language code: Graph[{Property[1, {VertexWeight -> 4, "Material" -> "Wood"}], 2, 3}, {12, 23, 31}]
Wolfram Language code: PropertyList[{%, 1}]

And edges:

Wolfram Language code: Graph[{1, 2, 3}, {Property[12, EdgeLabels -> "hello"], 23, 31}]
Wolfram Language code: PropertyList[{%, 12}]

Properties & Relations  (6)

Use Property as a wrapper to specify properties in functions such as Graph:

Wolfram Language code: Graph[{Property[1, {VertexSize -> Medium, VertexStyle -> Red}], 2, 3}, {12, 23, 31}]

Use PropertyValue to extract values:

Wolfram Language code: g = CompleteGraph[4, VertexStyle -> {1 -> Red}, VertexSize -> Small]
Wolfram Language code: PropertyValue[{g, 1}, VertexStyle]

For undefined properties, the value $Failed is returned:

Wolfram Language code: PropertyValue[{g, 1}, "foo"]
Wolfram Language code: MemberQ[PropertyList[{g, 1}], "foo"]

Use PropertyValue to set properties in a graph:

Wolfram Language code: g = CompleteGraph[4]
Wolfram Language code: PropertyValue[{g, 1}, VertexSize] = Small;

The original graph has changed:

Wolfram Language code: g

Use PropertyValue to unset properties in a graph:

Wolfram Language code: g = CompleteGraph[4, VertexSize -> {1 -> Small}]
Wolfram Language code: PropertyValue[{g, 1}, VertexSize]=.;

The original graph has changed:

Wolfram Language code: g

Use SetProperty to set the properties in a new graph:

Wolfram Language code: g = CompleteGraph[4]
Wolfram Language code: SetProperty[{g, 1}, VertexSize -> Small]

The original graph is unchanged:

Wolfram Language code: g

Use RemoveProperty to remove a property without changing the original:

Wolfram Language code: g = CompleteGraph[4, VertexSize -> {1 -> Small}]
Wolfram Language code: RemoveProperty[{g, 1}, VertexSize]

The original graph is unchanged:

Wolfram Language code: g
Wolfram Research (2010), PropertyList, Wolfram Language function, https://reference.wolfram.com/language/ref/PropertyList.html (updated 2015).

Text

Wolfram Research (2010), PropertyList, Wolfram Language function, https://reference.wolfram.com/language/ref/PropertyList.html (updated 2015).

CMS

Wolfram Language. 2010. "PropertyList." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2015. https://reference.wolfram.com/language/ref/PropertyList.html.

APA

Wolfram Language. (2010). PropertyList. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/PropertyList.html

BibTeX

@misc{reference.wolfram_2026_propertylist, author="Wolfram Research", title="{PropertyList}", year="2015", howpublished="\url{https://reference.wolfram.com/language/ref/PropertyList.html}", note=[Accessed: 15-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_propertylist, organization={Wolfram Research}, title={PropertyList}, year={2015}, url={https://reference.wolfram.com/language/ref/PropertyList.html}, note=[Accessed: 15-June-2026]}