Parse failure on dictionary with attribute and value

[dansherpa]

When I parse this:

<Mode System="B">Cable</Mode>

with:

xml.dictionary('Mode', [
        xml.string('.', attribute='System')
    ])

the result when serialized and printed is:

<Mode System="B"/>

What happened to the value (CABLE)?

Full code:

    proc = xml.dictionary('Mode', [
        xml.string('.', attribute='System')
    ])
    bar = xml.parse_from_string(proc, '<?xml version="1.0" encoding="UTF-8"?><Mode System="B">Cable</Mode>')
    print(xml.serialize_to_string(proc, bar, indent='   '))

[dansherpa]

Oh, I see. This processor does the trick:

    proc = xml.dictionary('Mode', [
        xml.string('.', attribute='System'),
        xml.string('.')
    ])

[dansherpa]

Never mind