Music Encoding Initiative Guidelines

Module

MEI

Used by

Attribute ClassesThese class-based attributes use data.LAYERSCHEME

att.staffDef.vis/@layerschemeIndicates the number of layers and their stem directions.

Allowed Values

1Single layer.

2oTwo layers with opposing stems.

2fTwo layers with 'floating' stems.

3oThree layers with opposing stems.

3fThree layers with 'floating' stems.

Declaration


                                 <macroSpec ident="data.LAYERSCHEME" module="MEI" type="dt">
                                    
                                    <desc xml:lang="en">Indicates how stems should be drawn when more than one layer is present and stem
                                       directions are not indicated on the notes/chords themselves. '1' indicates that there
                                       is only
                                       a single layer on a staff. '2o' means there are two layers with opposing stems. '2f'
                                       indicates
                                       two 'free' layers; that is, opposing stems will be drawn unless one of the layers
                                       has 'space'.
                                       In that case, stem direction in the remaining layer will be determined as if there
                                       were only
                                       one layer. '3o' and '3f' are analogous to '2o' and '2f' with three layers allowed.</desc>
                                    
                                    <content>
                                       
                                       <valList type="closed">
                                          
                                          <valItem ident="1">
                                             
                                             <desc xml:lang="en">Single layer.</desc>
                                             </valItem>
                                          
                                          <valItem ident="2o">
                                             
                                             <desc xml:lang="en">Two layers with opposing stems.</desc>
                                             </valItem>
                                          
                                          <valItem ident="2f">
                                             
                                             <desc xml:lang="en">Two layers with 'floating' stems.</desc>
                                             </valItem>
                                          
                                          <valItem ident="3o">
                                             
                                             <desc xml:lang="en">Three layers with opposing stems.</desc>
                                             </valItem>
                                          
                                          <valItem ident="3f">
                                             
                                             <desc xml:lang="en">Three layers with 'floating' stems.</desc>
                                             </valItem>
                                          </valList>
                                       </content>
                                    </macroSpec>