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1---
2navhome: /docs
3sort: 2
4---
6# Limbs and wings
8One feature Hoon lacks: a context that isn't a first-class value.
9Hoon has no concept of scope, environment, etc. A twig has one
10data source, the *subject*, a noun like any other.
12In most languages "variable" and "attribute" are different
13things. They are both symbols, but a variable is in "the
14environment" and a attribute is on "an object." In Hoon, "the
15environment" is "an object" -- the subject.
17`$limb` and `$wing` are two basic twig stems that extract
18information from the subject. A `limb` is an attribute; a `wing`
19is an attribute path, ie, a list of limbs.
21## Stems
23<list dataPreview="true" className="runes"></list>