Window

window WIN-3050 N1 in wall.W1 at 6' sill 3'-0"

A window is the opening interface with one refinement: sill is required, with no default (D0272) — a 0’ window sill is never intended, so the type can’t supply it and every placement writes its own, measured up from the host level (Revit’s Sill Height). The operable kinds’ selectors wait for windowtype; today’s windows keep the contextual jamb lens only. Placement: hosted, as the opening interface’s — in wall.W1 at 6'; see opening for the station vocabulary.

Parameters

Word	Accepts	Required	Meaning
`type` `WIN-3050`	a windowtype	instance · required	the windowtype, leading the statement — it fixes or delegates width and height
`in` `in wall.W1`	a wall	instance · required	the host wall
`at` `at 4'`	length	instance · required	the station along the host, from its start — or from a reference (`past` / `short of`), landing `to jamb`, `to jamb.far`, or `to centerline` the station’s reference words are their own rows — `past`, `short` — and the value is a length along the host, so `door.D1.jamb.far + 2'` composes here
`past` `past grid.A`	plane (normal xy)	instance · optional	the datum the station measures forward from
`short` `short of grid.B`	plane (normal xy)	instance · optional	the datum the station measures back from spelled `short of`: `at <length> short of <datum>`
`width` `width 3'-0"`	length	bound	the clear width — every window has one; the type fixes it or delegates it (`instance`) to each placement
`height` `height 7'-0"`	length	bound	the clear height — every window has one; the type fixes it or delegates it (`instance`) to each placement
`u-` `u-fire-rating "90"`	length or boolean or text	bound	job-specific data, one row per name (`u-fire-rating`): fixed on the type, or delegated (`instance <type> [required]`) and supplied per placement
`sill` `sill 3'-0"`	length	instance · required	the sill height, up from the host level — where THIS window sits, so the type can’t supply it

Reserved

Word	Rung	Meaning	Arrives with
`fire-rating`	type	the assembly’s fire rating — drawn, not just scheduled (NCS ships nine fire-rating linetypes)	the `duration` value type (`90 min`, `2 hr`) — every parameter value carries units; until then the corpus spells it as text, `u-fire-rating "90"`
`hardware-set`	type	the hardware set the leaf carries	the door worksheet — `u-` today, a built-in candidate then
`head-height` (derived)	instance	the head’s height above the level — sill + height (Revit’s Head Height)	the derived-parameter era
`kind`	type	which kind of leaf the type is — the category’s declaration lists them	a second kind of leaf — the door’s and the window’s declarations list what is coming (D0242)
`label`	instance	what the tag prints when it is not the id	a bubble or tag printing text other than the id — the grid’s bubble is the one that ships
`phase`	instance	the phase this element is created in	the phasing era — phases are an ordered list declared in their own file, and a view looks at the model as of one
`demolished`	instance	the phase this element is demolished in	the phasing era — phases are an ordered list declared in their own file, and a view looks at the model as of one

Datums

Inherited from opening: centerline / cl, head, sill, jamb (pair), jamb / jamb.near / jamb.far.

Datum	Shape	Status	Resolution	Rule
`sill`	plane	refinement (required)	intrinsic	The base interface’s `sill`, refined: required for every window, with no default — a 0’ window sill is never intended, so the opening’s level default does not apply here. Still measured up from the host LEVEL (Revit’s Sill Height), so a wall’s base offset never moves its windows; `0'` is a legal answer when written.
(kind selectors)	—	reserved	operational	Swing-less windows keep the contextual jamb lens only; the operable kinds (casement/awning/hopper — both mirrorable axes) gain their own selectors when `windowtype` lands, inside the mirrorable-axes schema.

Roles

elevation-swing · frame · glass · opening · swing · sill-head

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