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TXmlNode.WriteAttributeString
TXmlNode
procedure WriteAttributeString(const AName: Utf8String; AValue: Utf8String; ADefault: Utf8String); virtual;
Description
If the attribute with name AName exists, then set its value to the string AValue. If it does not exist, then create a new attribute AName with the string value with quotes. If ADefault = AValue, and WriteOnDefault = False, no attribute will be added.