anyURI data type
See the definition in the W3C XML Schema standard.
Where is this type used?
<credit-image> — "source" attribute
<image> — "source" attribute
<link> — "xlink:href" attribute
<opus> — "xlink:href" attribute
<opus-link> — "xlink:href" attribute
<part-link> — "xlink:href" attribute
<score> — "xlink:href" attribute