The breakpoint set definition element, breakpointDef, is used to define a list
of comma-separated values that define the coordinate values along one axis of a gridded
linear function value table. It contains a mandatory bpID, a
file-unique XML identifier attribute, an optional name and
units-of-measure attributes, an optional text description element and
the comma-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-separated breakpoints)
breakpointDef
attributes:
bpIDAn XML-legal name that is unique within the file.
nameA UNICODE name for the set (may be the same string as
bpID).unitsThe units-of-measure for the breakpoint values. See Section 6.5.6, “Units of measure abbreviation” below.
breakpointDef sub-elements:
descriptionAn optional text description of the breakpoint set.
bpValsA comma-separated, monotonically-increasing list of floating-point values.
Example 7. Two excerpts with examples of breakpointDef elements
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=""><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="d"> <description>Lower body flap deflections breakpoints for tables</description> <bpVals>0., 15., 30., 45., 60.</bpVals> </breakpointDef>