compact (filter)

5reg

compact (filter)

Replaced by attributes of &xml-filterprop;

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

&eltdepver;7.0

## Description

This element was used in the past to represent a constraint on the compactness of a normal surface. Since ®ina; 7.0, this constraint is now stored in the attributes of the corresponding &xml-filterprop; element instead.

A compact surface is one containing finitely many normal discs.

### Parents

The following elements contain `compact` (in the context of a constraint on surface properties):

- &xml-filter-properties;

.

### Children

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

## Attributes

`value`

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

  - `TF` signifies that the surface may be either compact or non-compact, i.e., no constraint is imposed.

  - `T-` signifies that the surface must be compact.

  - `-F` signifies that the surface must be non-compact.

  - `--` signifies that the surface must be neither compact nor non-compact, i.e., no surfaces are accepted.