Hi Devansh,
This is wrong:
chart:class="chart:histogram"
"histogram" does not belong to the chart types that are predefined in
the ODF standard. Only the names of the predefined chart types may have
a prefix "chart". For chart types not defined in the standard you have
to use a prefix different from "chart". For chart types defined by
LibreOffice use the prefix "loext".
So it should be
chart:class="loext:histogram"
in both cases.
This is wrong:
<loext:histogram-configuration loext:histogram-frequency-type="0"
loext:histogram-bin-count=""
loext:histogram-overflow-bin=""
loext:histogram-underflow-bin=""
loext:histogram-interval-closed="true"/>
If an attribute does not exist, you simple omit the attribute.
(Precondition it is set as 'optional' in the schema, as it is in your
case.) So the element would be
<loext:histogram-configuration loext:histogram-frequency-type="0"
loext:histogram-interval-closed="true"/>
Kind regards,
Regina
