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barchart
|
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A display object that shows one
or more variables as vertical or horizontal bars whose lengths
correspond to the values. |
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button |
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A display object that consists of
an image or icon that, when clicked, can assign a value to a
variable. |
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data_source |
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A pool-level data source that is
available for use by any of the variables in the variable pool. |
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data_source_pool |
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Contains data_source child elements
representing all of the data sources used by the various objects
in the DDML file. Information about all data sources (files,
db connections, etc.) is kept in the data source pool. |
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ddml |
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The top-level element in a DDML
document. |
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dial |
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A display object that consists of
a circular or arc value axis and some sort of marker or needle
that points to the current value along this axis. Example: a
dial or a compass. |
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display_parameters |
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The parent element of a group of
param elements that specify all of the custom parameters for
a particular display object. |
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dynamics |
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A set of variable_uses and rules
used to define the dynamic behavior of a display object. The
type attribute describes the dynamic behavior while the variable_use
and rules child elements define how variable values affect that
behavior. A type of 'builtin' is used for display objects that
have implicit dynamic behavior, such as charts and sliders.
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else |
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Part of a rule, specifies what to
do if the criteria specified in the if element are false. The
else element can be the parent of one or more additional rules,
or can just specify a value or variable reference. |
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expr |
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Defines a variable as a function
of other variables. Expr elements can be nested to create more
complex expressions.
Example: 2*(var1)^2 + 2*sin(var2)^2 would be represented as:
<variable id="var3"
data_source_ref="ds2" name="Var:3">
<expr coef="2" var_ref="var1" power="2"
/>
<expr coef="2" oper="SIN" power="2">
<expr var_ref="var2"
/>
</expr>
</variable> |
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frequencyplot |
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A display object that is a chart
in the frequency domain. |
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frequencyresponse |
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A display object that is a graph
consisting of two value axes (frequency and magnitude) plotted
against a single frequency axis. |
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graphics |
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The top-level element for a group
of svg elements (primitive shapes such as lines, circles, and
rectangles). |
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grid |
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A table. The grid element is used
to group several display objects (including other grids) together
in a tabular layout. |
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hud |
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A display object that resembles
a typical aircraft heads-up display that consists of three vertical
axes (typically used for velocity, pitch, and altitude) and
one horizontal axis (typically for heading). The center vertical
axis rotates according to a fifth variable (typically roll).
The variable_uses in the dynamics section are applied in this
order: center vertical axis rotation (roll), center vertical
axis (pitch), horizontal axis (heading), right vertical axis
(altitude), left vertical axis (velocity). |
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if |
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Part of a rule, specifies the first
and/or last values in a desired range (inclusive or exclusive),
or a single value to compare for inequality. |
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model |
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A single screen or page of display
objects. |
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object |
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A generic display object. An 'object'
can be any display object not specified in the DDML definition,
or can be used as the top-level element in a group of sub-objects. |
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param |
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Used to specify any parameter of
a DDML element that is not already specified in the element's
attribute list. These are commonly referred to as "custom parameters"
and are mostly used for vendor-specific information. |
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piechart |
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A circular display object that shows
the values of multiple variables as a percentage slice of their
sum. |
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project |
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A collection of models. |
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radialchart |
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A display object that represents
variable values as distances outward from a central point. A
radial chart consists of two axes: a linear value axis and a
circular axis. The circular axis can be either a time axis or
a value axis. The type of the circular axis is controlled by
the circularAxisType attribute, which can have a value of either
'time' or 'firstVar'. If the value is 'firstVar', then the circular
axis is a value axis whose value is controlled by the first
variable_use element in the radialchart's dynamics section. |
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rule |
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Specifies a change in an attribute
(e.g., color, visibility) when a variable reaches a certain
value or range of values. The ranges of values and resulting
attribute values are specified with if, then, and else child
elements. |
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rules |
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The parent element of a group of
rule elements. |
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slider |
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A display object that consists of
some kind of indicator or icon that slides along a single value
axis. A slider can be vertical or horizontal. Example: A 'gauge'
in Range View or a 'fader' in Data Views. |
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stripchart |
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A display object that is essentially
a line graph that plots values vs. time along a scrolling "paper"
grid. A stripchart can be vertical or horizontal, and can scroll
in any of the four directions (up, down, left, right). This
is controlled by the scrollDirection attribute. The scrollDirection
attribute refers to the direction that the paper or background
scrolls. For example, in a DataViews horizontal strip chart,
the paper scrolls to the left while new values are plotted at
the right edge of the graph. Thus, the scrollDirection is 'left'.
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textual |
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A display object used for representing
text and labels, including both static and dynamic text (such
as annunciators). If the text is dynamic, the valuePosition
attribute specifies where the dynamic value is in relation to
the static label. Use valuePosition='center' if there is no
label. The valueFormat attribute is a C printf-style format
string that specifies the format of the dynamic value. For example
valueFormat="%4.2f" indicates that the value should be output
as a floating-point value with a maximum width of 4 and with
2 decimal places. |
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then |
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Part of a rule, the then element
specifies the value to set the attribute to if the criteria
specified in the if element is true. The then element can specify
either the desired value, or a reference to a variable containing
the desired value. |
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variable |
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A pool-level data variable that
is available for use by any of the display objects in the ddml
file. |
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variable pool |
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Contains variable child elements
representing all of the variables used by the various display
objects in the DDML file. |
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variable use |
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A child of the dynamics element,
variable_use is used to specify which variable from the variable
pool is used. The pool_ref attribute must refer to the id attribute
of a variable element from the variable_pool. |
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xychart |
| |
A display object that is a line
or xy scatter plot of variables in the yaxis vs. other variables
in the x axis. The x,y variable pairs are specified with the
xyPairs attribute with the form xyPairs="x1,y1 x2,y2 x3,y3".
Each x1,y1,x2 etc. value must be a reference to the id attribute
of a variable_use element in the xychart's dynamics section. |
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