Liblouis User's and Programmer's Manual

2.6.2.1 Permanent indicator ¶

Many languages simply have an indicator for the beginning of emphasis and another one for the end of the emphasis. The emphasis is “permanent” in the sense that it needs an end indicator to cancel it. It is not implicitly canceled by any character or space.

Characters that are defined as not emphasizable in braille (see noemphchars) are not indicated as such by Liblouis. This means that if an emphasized phrase begins or ends with such characters, they will not be within the part enclosed by the two indicators. Also, if multiple emphasized parts are separated by unemphasizable characters only, it will be indicated as if it was a single emphasized phrase, with one start indicator and one end indicator.

A table can not specify both a permanent indicator and a word indicator (see Word indicator) for a certain emphasis class.

begemph <emphasis class> <dot pattern>

Braille dot pattern to indicate the beginning of emphasis.

begemph italic 46

A begemph rule must always be combined with a endemph rule.

endemph <emphasis class> <dot pattern>

Braille dot pattern to indicate the end of emphasis.

endemph italic 46-36

noemphchars <emphasis class> characters

Normally, emphasis is indicated on all characters except spaces (characters with a space attribute, see space). You can change this with the noemphchars opcode. When this opcode is specified, emphasis is indicated on all characters except the ones in the list. That means that emphasis is also indicated on spaces unless the list contains space characters (escaped, e.g. \s).

Example:

noemphchars italic \s'()