<desc>Specifies the symbols used by the marker-construction algorithm specified by the system descriptor. Needs to be specified if the counter system is 'additive'.</desc>
<desc>Specifies the symbols used by the marker-construction algorithm specified by the system descriptor. Needs to be specified if the counter system is 'additive'.</desc>
"desc":"Specifies the symbols used by the marker-construction algorithm specified by the system descriptor. Needs to be specified if the counter system is 'additive'.",
"desc":"Specifies the symbols used by the marker-construction algorithm specified by the system descriptor. Needs to be specified if the counter system is 'additive'.",