WolframLanguageData

WolframLanguageData[entity,property] gives the value of the specified property for the Wolfram Language symbol entity.

WolframLanguageData[{entity1,entity2,…},property] gives a list of property values for the specified Wolfram Language symbol entities.

WolframLanguageData[entity,property,annotation] gives the specified annotation associated with the given property.

Please visit the official Wolfram Language Reference for more details and examples on core symbols.