RTEditor/src/main/java/com/onegravity/rteditor/converter/tagsoup/Parser.java
private String prefixOf(String name) {
        int i = name.indexOf(':');
        String prefix = "";
        if (i != -1)
            prefix = name.substring(0, i);
        return prefix;
    }
private String prefixOf(String name) {
        int i = name.indexOf(':');
        String prefix = "";
        if (i != -1)
            prefix = name.substring(0, i);
        return prefix;
    }
Get the prefix from a QName