<classSpec ident="att.curvature" module="MEI.shared" type="atts">
<desc xml:lang="en">Attributes that describe curvature.</desc>
<attList>
<attDef ident="bezier" usage="opt">
<desc xml:lang="en">Records the placement of Bezier control points as a series of pairs of space-separated
values;
<abbr>e.g.</abbr>,
<val>19 45 -32 118.</val></desc>
<datatype>
<rng:list>
<rng:oneOrMore>
<rng:data type="decimal"/>
<rng:data type="decimal"/>
</rng:oneOrMore>
</rng:list>
</datatype>
</attDef>
<attDef ident="bulge" usage="opt">
<desc xml:lang="en">Describes a curve as one or more pairs of values with respect to an imaginary line
connecting the starting and ending points of the curve. The first value captures a
distance to the left (positive value) or right (negative value) of the line, expressed
in
virtual units. The second value of each pair represents a point along the line, expressed
as a percentage of the line’s length. N.B. An MEI virtual unit (vu) is half the distance
between adjacent staff lines where the interline space is measured from the middle
of a
staff line.</desc>
<datatype>
<rng:list>
</rng:list>
</datatype>
</attDef>
<attDef ident="curvedir" usage="opt">
<desc xml:lang="en">Describes a curve with a generic term indicating the direction of curvature.</desc>
<valList type="closed">
<valItem ident="above">
<desc xml:lang="en">Upward curve.</desc>
</valItem>
<valItem ident="below">
<desc xml:lang="en">Downward curve.</desc>
</valItem>
<valItem ident="mixed">
<desc xml:lang="en">A "meandering" curve, both above and below the items it pertains to.</desc>
</valItem>
</valList>
</attDef>
</attList>
</classSpec>