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Functions
...
have
...
access
...
to
...
the
...
data
...
row
...
and
...
can
...
access
...
other
...
functions
...
or
...
expressions
...
or
...
the
...
data
...
source.
...
Functions
...
are
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stateful
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meaning
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they
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maintain
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their
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state
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during
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the
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report
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generation.
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For
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stateless
...
user-defined
...
computations,
...
consider
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using
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an
...
expression
...
instead
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of
...
functions,
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as
...
expression
...
are
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cheaper
...
to
...
compute
...
and
...
maintain
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when
...
using
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huge
...
reports.
...
Function
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parameters
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are
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given
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by
...
property
...
elements.
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The
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deplevel
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attribute
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can
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be
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used
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to
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prioritize
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the
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functions.
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Functions
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with
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an
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higher
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dependency
...
level
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are
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executed
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before
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any
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function
...
with
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lower
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dependency
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levels.
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Dependency
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levels
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lower
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than
...
0
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are
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not
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allowed.
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An
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expression
...
is
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a
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stateless
...
user-defined
...
function.
...
It
...
can
...
access
...
the
...
data
...
row
...
and
...
the
...
report
...
properties
...
(property-ref)
...
to
...
perform
...
its
...
task.
...
Using
...
the
...
data
...
row,
...
an
...
expression
...
has
...
access
...
to
...
the
...
data
...
source
...
and
...
other
...
functions
...
and
...
expressions.
...
Expression
...
parameters
...
are
...
given
...
by
...
property
...
elements.
...
Function/Expression |
|---|
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Type |
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Description | |
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These calculate values for display in groups, headers and footers. | |
These calculate values for display in item (detail) bands. | |
These are misc. advanced calculations. | |
These are functions and expressions for generating charts within reports. |