how to properly declare metadata in epub3

[mzmm]

hi all,

couple questions about metadata in epub3:

1) is the opf namespaced attribute been deprecated?

<dc:creator opf:file-as="Last, First"> ...

1a) if so, does anyone know why?

2) given that it this format is deprecated, what is the correct format for including attributes in the opf namespace?

Oreilly's epub3 best practices declares the following as the correct way to use the property attribute:

<meta refines="#creator" property="file-as">Murakami, Haruki</meta>

but, the namespace is not declared as they suggest in the following paragraph:

You can also use property values, which must include the proper prefix, from any of the reserved vocabularies or any vocabulary for which you’ve declared the prefix:
    <meta property="dcterms:dateCopyrighted">2012</meta>

wouldn't this mean that the following should be the correct implementation?:

<metadata
    xmlns:opf='http://www.idpf.org/2007/opf'
   ... >

<meta refines="#creator" property="opf:file-as">Murakami, Haruki</meta>

3) is there a comprehensive list of values allowed for the property attribute (role, meta-auth, etc)?

thanks in advance!