a=1&b=2
type: Concept
type: Thing
type: NamedIndividual
type: URIPart
notation: a=1&b=2
item: a=1
item: b=2
a: 1
b: 2
in dataset: part

a=1
type: PropertyValue
property ID: a
value: 1

b=2
type: PropertyValue
property ID: b
value: 2

a
type: Property
type: URIField
notation: a
property ID: a
in dataset: field

b
type: Property
type: URIField
notation: b
property ID: b
in dataset: field

a=1&b=2
type: Document
primary topic: a=1&b=2