orbl (filter)


	orbl (filter)

Name

orbl (filter) — Replaced by attributes of filterprop

Synopsis

Content Model
orbl ::=
Attributes
Name	Type
`value`	CDATA (required)

Deprecated since Regina 7.0

Description

This element was used in the past to represent a constraint on the orientability of a normal surface. Since Regina 7.0, this constraint is now stored in the attributes of the corresponding filterprop element instead.

Parents

The following elements contain orbl (in the context of a constraint on surface properties): filter (properties).

Children

Element orbl (in the context of a constraint on surface properties) has no children.

Attributes

value

Contains the specific constraint upon the orientability of a surface. The following values are allowed.

TF signifies that the surface may be either orientable or non-orientable, i.e., no constraint is imposed.
T- signifies that the surface must be orientable.
-F signifies that the surface must be non-orientable.
-- signifies that the surface must be neither orientable nor non-orientable, i.e., no surfaces are accepted.

Prev	Contents	Next
op	Up	packet