[mapguide-internals] Re: FeatureSet xml serialization issues (RE: SELECTFEATURES via mapagent and null values)

[Jackie Ng]

An empty string (a string property whose value is "") is different to a null
string (a string property without an actual assigned value).

If by your suggestion that null property values are coerced into empty
strings when serializing, then empty string values (which may be legitimate)
will be misinterpreted as null string values when serialized.

- Jackie
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