Path Expressions

Path expressions are needed in order to access components

of objects.

Attributes:

a.p is the value of the attribute a of p.

Relationships:

a.p is the object or collection of objects related to a by p.

Methods:

a.p is the result of applying p to a (perhaps with a parameter).

Also possible to have longer expressions:

a.father.wife.child.father.wife….

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