dtd

What are the pros / cons in DTD and XML Schemas (I'm not even sure what the official name of the latter is!)? Which is better? Why do we need two ways to do the same thing? Edit: I found this in an article I was reading, which is what prompted me to ask the question: Why W3C XML Schema Language? The W3C XML Schema Language is not the only schema language. In fact, the XML specification describes document-type definitions (DTDs) as the way to express a schema. In addition, pre-release versions of the JAXB Reference Implementation worked only with DTDs -- that is, not with schemas written in the

What is the difference between #PCDATA and #CDATA in DTD ? Matthew Vines PCDATA - Parsed Character Data XML parsers normally parse all the text in an XML document. CDATA - (Unparsed) Character Data The term CDATA is used about text data that should not be parsed by the XML parser. Characters like "<" and "&" are illegal in XML elements. Rose Perrone PCDATA is text that will be parsed by a parser. Tags inside the text will be treated as markup and entities will be expanded. CDATA is text that will not be parsed by a parser. Tags inside the text will not be treated as markup and entities will

I started off using an XML file and a parser as a convenient way to store my data I want to use DTD to check the structure of the xml files when they arrive. Here is my DTD file < ?xml version="1.0" encoding="UTF-8"?> < !ELEMENT document (level*)> < !ELEMENT level (file,filelName?,fileNumber?)> < !ELEMENT file (#PCDATA)> < !ELEMENT filelName (#PCDATA)> < !ELEMENT fileNumber (#PCDATA)> (note that fileName and fileNumber are actually purely optional) and <document> <level> <file>group1file01</file> </level> <level> <file>group1file02</file> <fileName>file 2</fileName> <fileNumber>0</fileNumber>

I'm trying to use JAXB to unmashall some XML which I used xjc to create in the first place. I don't want to do any validation on the unmarshalling, but even though I have disabled the validation according to the JAXB documentation with u.setSchema(null); , but this hasn't prevented a FileNotFoundException being thrown when it tries to run and can't find the schema. JAXBContext jc = JAXBContext.newInstance("blast"); Unmarshaller u = jc.createUnmarshaller(); u.setSchema(null); return u.unmarshal(blast) I've seen similar questions for disabling SAX parsing from validation by setting the apache

I am trying to set the innerxml of a xmldoc but get the exception: Reference to undeclared entity XmlDocument xmldoc = new XmlDocument(); string text = "Hello, I am text α   – —" xmldoc.InnerXml = "<p>" + text + "</p>"; This throws the exception: Reference to undeclared entity 'alpha'. Line 2, position 2.. How would I go about solving this problem? XML, unlike HTML does not define entities (ie named references to UNICODE characters) so α — etc. are not translated to their corresponding character. You must use the numerical value instead. You can only use < and & in XML If you want to create

I need to validate an XML string (and not a file) against a DTD description file. How can that be done in python ? Michael Twomey Another good option is lxml's validation which I find quite pleasant to use. A simple example taken from the lxml site: from StringIO import StringIO from lxml import etree dtd = etree.DTD(StringIO("""<!ELEMENT foo EMPTY>""")) root = etree.XML("<foo/>") print(dtd.validate(root)) # True root = etree.XML("<foo>bar</foo>") print(dtd.validate(root)) # False print(dtd.error_log.filter_from_errors()) # <string>:1:0:ERROR:VALID:DTD_NOT_EMPTY: Element foo was declared EMPTY

I want to use either a DTD or an XSD to describe my XML document. I've read that XSDs are better than DTDs since they support namespaces and data types, and that DTDs are older. Does this mean that I should only use XSDs for all future needs and totally ignore DTD as an option? Should I even bother learning the structure of DTDs? What factors should I consider when choosing between XSD and DTD? Mike Mooney It's probably important to learn DTDs as a separate exercise, just for the knowledge of how they work in case you encounter them somewhere else, and so that you can appreciate some of the