Creates a GValue from an XML representation of it.
That XML node corresponds to the following string representation: <value type="gdatype">value</value>
For more information about the string format, see the value_set_from_string function. This function is typically used when reading configuration files or other non-user input that should be locale independent.
| node |
an XML node representing the value. |
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the newly created Value. Free-function: gda_value_free |