This error typically indicates that the XML document is missing its root element. Check that the XML file starts with a root tag like <root>...</root> and ensure that the document structure follows proper XML formatting rules.
If you open the xml in most web browser it will state an error code denoting the type of malformation of the xml. you can use an xml tool like an xml editor to validate and correct your xml.
XML is more strict. For HTML, doing <b><i></b></i> wouldn't matter. That would be invalid XML. Also, XML has no set tags. It's for storing and retrieving set data, that can be used with JavaScript code.
That depends on what you want to do, xml tools include; xml parsers xml validators xml editors xml schema editors xml code generators
there is no source code, xml is not a programming language, its a markup language for which you create your own tags, the basic xml syntax is <xml> to start an xml file, and </xml> to end the xml file.
it is the same way to create xml file by converting into txt you have to use the correct xml syntax ie <xml> this is to denote strat of xml file and this </xml> denotes end of xml file. You have to use the right xml code or your xml file wont be valid or well formed.
If you use an xml tool like liquid xml studio or any other xml tool you will be able to convert your xml into an xsd or dtd.
XML Schema is an XML-based alternative to DTD.An XML schema describes the structure of an XML document.The XML Schema language is also referred to as XML Schema Definition (XSD).An XML schema is a description of a type of XML document, typically expressed in terms of constraints on the structure and content of documents of that type, above and beyond the basic syntactical constraints imposed by XML itself.
XML is a language used to store data. XSLT is a language which is used to transform XML into other XML.
Well-formed XML means that the XML is correct (it has only one root node, and all elements match an end element tag)Valid XML means that the XML can be validated to an XML Schema or DTD, and that all the tags in the XML are also in the Schema or DTD, and in the right place.
xml stands for extensible markeup language, xml is a meta language.
an xml value can be anything, its up to as xml is not a semantic language like html.