Something really really minor - on the documentation, section 5.8 for xmli_setFormat() it says the valid values are XML_FORMAT_NONE and XML_FORMAT_SIMPLE - if I'm not mistaken you also have XML_FORMAT_TEMPLATE, XML_FORMAT_PRETTY and XML_FORMAT_TAB
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Something really really minor - on the documentation, section 5.8 for xmli_setFormat() it says the valid values are XML_FORMAT_NONE and XML_FORMAT_SIMPLE - if I'm not mistaken you also have XML_FORMAT_TEMPLATE, XML_FORMAT_PRETTY and XML_FORMAT_TAB