Today, you took a attending at how to actualize admirable XML documents. W3C doesn’t alike accede an XML certificate to be XML unless it’s well-formed. W3C considers an XML certificate admirable if it meets three criteria:
Taken as a whole, it matches the assembly labeled document.
It meets all the well-formedness constraints accustomed in this blueprint (that is, the XML 1.0 specification, http://www.w3.org/TR/REC-xml).
Each of the parsed entities, which is referenced anon or alongside aural the document, is well-formed.
The best accepted of these items says that an XML certificate charge accommodated the well-formedness constraints in the XML specification, and you took a attending today at what that meant.
Those constraints accommodate alpha a certificate with an XML declaration, application alone acknowledged appearance references, the certificate charge accommodate at atomic one element, elements charge be structured and nested correctly, the basis aspect charge accommodate all added elements, aspect names charge be unique, aspect ethics charge be quoted, and so on.
You additionally took a attending at creating namespaces, and how namespaces advice you abstain conflicts in XML. To ascertain a namespace, you can accredit the xmlns:prefix aspect to a different identifier (usually a URI), or you can use the xmlns aspect to ascertain a absence namespace.
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