A count of measures plus a beat location, i.e., (\+)?[09]+m\+[09]+(\.?[09]*)?. The measure count is the number of barlines crossed by the event, while the beat location is a timestamp expressed as a beat with an optional fractional part. The measure number must be in the range of preceding measures to the number of remaining measures. A value with a positive measure number, such as "1m+3", indicates a point in the following measure, while a value with a negative measure number, such as "1m+3", marks a point in the preceding measure. The beat number must be in the range from 0 to the numerator of the time signature plus 1. For example, in 6/8 the beat number must be within the range from 0 (the left barline) to 7 (the right barline). A value with a measure number of "0", such as "0m+2", indicates a point within the current measure.  
Module  MEI 
Used by 
att.origin.timestamp.musical (@origin.tstamp)

Declaration 
