The Verifier Class

package org.jdom;

public final class Verifier {

    public static final String checkElementName(String name)
    public static final String checkAttributeName(String name)
    public static final String checkCharacterData(String text)
    public static final String checkNamespacePrefix(String prefix)
    public static final String checkNamespaceURI(String uri)
    public static final String checkProcessingInstructionTarget(String target)
    public static final String checkCommentData(String data)
 
    public static boolean isXMLCharacter(char c)
    public static boolean isXMLNameCharacter(char c)
    public static boolean isXMLNameStartCharacter(char c)
    public static boolean isXMLLetterOrDigit(char c)
    public static boolean isXMLLetter(char c)
    public static boolean isXMLCombiningChar(char c)
    public static boolean isXMLExtender(char c)
    public static boolean isXMLDigit(char c)

    public static final String checkNamespaceCollision(
     Namespace namespace, Namespace other)
    public static final String checkNamespaceCollision(
     Attribute attribute, Namespace other)
    public static final String checkNamespaceCollision(
     Namespace namespace, Element element)
    public static final String checkNamespaceCollision(
     Namespace namespace, Attribute attribute)
    public static final String checkNamespaceCollision(
     Namespace namespace, List list)

}