RTEditor/src/main/java/com/onegravity/rteditor/converter/tagsoup/ElementType.java
public void setAttribute(AttributesImpl atts, String name, String type,
                             String value) {
        if (name.equals("xmlns") || name.startsWith("xmlns:")) {
            return;
        }
        ;
        String namespace = namespace(name, true);
        String localName = localName(name);
        int i = atts.getIndex(name);
        if (i == -1) {
            name = name.intern();
            if (type == null)
                type = "CDATA";
            if (!type.equals("CDATA"))
                value = normalize(value);
            atts.addAttribute(namespace, localName, name, type, value);
        } else {
            if (type == null)
                type = atts.getType(i);
            if (!type.equals("CDATA"))
                value = normalize(value);
            atts.setAttribute(i, namespace, localName, name, type, value);
        }
    }
public void setAttribute(AttributesImpl atts, String name, String type,
                             String value) {
        if (name.equals("xmlns") || name.startsWith("xmlns:")) {
            return;
        }
        ;
        String namespace = namespace(name, true);
        String localName = localName(name);
        int i = atts.getIndex(name);
        if (i == -1) {
            name = name.intern();
            if (type == null)
                type = "CDATA";
            if (!type.equals("CDATA"))
                value = normalize(value);
            atts.addAttribute(namespace, localName, name, type, value);
        } else {
            if (type == null)
                type = atts.getType(i);
            if (!type.equals("CDATA"))
                value = normalize(value);
            atts.setAttribute(i, namespace, localName, name, type, value);
        }
    }
Sets an attribute and its value into an AttributesImpl object. Attempts
to set a namespace declaration are ignored.

@param atts  The AttributesImpl object
@param name  The name (Qname) of the attribute
@param type  The type of the attribute
@param value The value of the attribute