This element represents one chamber in the organ; that is, an enclosure or space which contains pipes and other sound-producing elements. The use of the Chamber element is optional. It may be used to describe where the pipe ranks are located, in which case it will contain Rank elements. A Chamber element may also contain, or be contained by, a Keyboard or Division element in order to show the distribution of stops between chambers without having to use Rank elements. For more details on usage, see Chambers, Divisions & Keyboards. See also SwellPedal.

Division	While divisions do not, in reality, contain chambers, this organization may be used to avoid unnecessary complexity.
Keyboard	While keyboards do not, in reality, contain chambers, this organization may be used to avoid unnecessary complexity.
Organ	Chamber elements are normally contained in the Organ element.

Name	How Many	Description
Accessory	(zero or more)	An accessory contained within the chamber.
Division	(zero or more)	A division contained within the chamber.
Keyboard	(zero or more)	A keyboard whose pipes are contained within the chamber.
Pressure	(zero or more)	The wind pressure for the chamber.
Rank	(zero or more)	A rank contained within the chamber.
Remark	(zero or more)	Remarks about this Chamber.
Stop	(zero or more)	A stop contained within the chamber. This organization is only used when the Chamber element is contained within a Keyboard or Division element.
Trap	(zero or more)	A trap contained within the chamber.

dateInstalled

The date on which this Chamber was installed (see date formats). This attribute should only be used for Chambers added after the original instrument was finished.

dateRemoved

The date on which this Chamber was removed (see date formats).

enclosed   (required)

Specifies whether the chamber is enclosed behind swell shades. The value of this attribute must be "true" or "false".

id

An identifier for referencing this element from within other elements.

installedBy

The ID of the Builder element describing the builder who installed the Chamber. This attribute should only be used for Chambers added after the original instrument was finished.

name

The name of the chamber, e.g. "Great", "Choir".

removedBy

The ID of the Builder element describing the builder who removed the Chamber.

The following example shows a single division (Swell) which is divided into two chambers, both under independent expression.

<Organ>
    <Keyboard name="Swell">
        <Chamber name="flues" enclosed="yes">
            <Stop name="Bourdon" pitch="8"> </Stop>
            <Stop name="Salicional" pitch="8"> </Stop>
            <Stop name="Voix Celeste" pitch="8"> </Stop>
        </Chamber>
        <Chamber name="reeds" enclosed="yes">
            <Stop name="Trumpet" pitch="8"> </Stop>
            <Stop name="Oboe" pitch="8"> </Stop>
            <Stop name="Vox Humana" pitch="8"> </Stop>
        </Chamber>
    </Keyboard>
</Organ>

The following example shows two divisions enclosed in the same chamber.

<Organ>
    <Chamber enclosed="yes">
        <Keyboard name="Swell">
            <Stop name="Stopped Diapason" pitch="8"> </Stop>
            <Stop name="Flute Harmonique" pitch="4"> </Stop>
        </Keyboard>
        <Keyboard name="Great">
            <Stop name="Open Diapason" pitch="8"> </Stop>
            <Stop name="Octave" pitch="4"> </Stop>
        </Keyboard>
    </Chamber>
</Organ>

<!ELEMENT Chamber (
	Accessory |
	Division |
	Keyboard |
	Pressure |
	Rank |
	Remark |
	Stop |
	Trap )* >
<!ATTLIST Chamber
	dateInstalled CDATA ""
	dateRemoved CDATA ""
	enclosed (true|false) #REQUIRED
	id ID #IMPLIED
	installedBy IDREF #IMPLIED
	name CDATA ""
	removedBy IDREF #IMPLIED
	>