The breakpoint set definition element, breakpointDef, is used to define a list
of comma- or white space-separated values that define the coordinate values along one axis
of a gridded linear function value table. It contains a mandatory bpID
attribute, an optional name and units-of-measure attributes, an
optional text description element, and the comma- or
white space-separated list of floating-point values in the bpVals
element. This list must be monotonically increasing in value.
breakpointDef : bpID, [name, units]
description? :
bpVals :
{character data of comma- or white space-separated breakpoints}
breakpointDef
attributes:
-
bpID An internal reference that is unique within the file.
-
name A UNICODE name for the set (may be the same string as
bpID).-
units The units-of-measure for the breakpoint values. See Section 6.5.6, “Units” below.
breakpointDef
sub-elements:
-
description An optional text description of the breakpoint set.
-
bpVals A comma- or white space-separated, monotonically increasing list of floating-point values.
Example 7. Two breakpointDef examples in a DAVE-ML model excerpt
As an example, two breakpoint sets are defined which are used in the
function element given below (Example 11, “
An excerpt giving the example of a function which refers to a previously defined
griddedTableDef
”). Breakpoint sets XMACH1_PTS and
DBFL_PTS contain values for Mach and lower body flap deflection,
respectively, which are used to look up function values in several gridded function
tables. One example is given below in Example 8, “
An excerpt showing an example of a griddedTableDef element
”.
<!-- ===================== --> <!-- ========================= BREAKPOINT SETS ========================= --> <!-- ===================== --> <breakpointDef name="mach" bpID="XMACH1_PTS" units="nd"><description> Mach number breakpoints for all aero data tables </description> <bpVals> 0.3, 0.6, 0.8, 0.9, 0.95, 1.1, 1.2, 1.6, 2.0, 2.5, 3.0, 3.5, 4.0
</bpVals> </breakpointDef> <breakpointDef name="Lower body flap" bpID="DBFL_PTS" units="deg">
<description>Lower body flap deflections breakpoints for tables</description> <bpVals>0., 15., 30., 45., 60.</bpVals> </breakpointDef>