PDF Declaration requirements

Issue #xxxx

8. PDF Declaration requirements

8.2 PDF Declarations Property Value Types

Change Table 2 as follows:

Table 2 - PDF Declaration fields.
Name	Type	Property content
pdfd:conformsTo	URI	(Required) A property containing a URI specifying the standard or profile referred to by the PDF Declaration. This property is intended to mirror the Dublin Core property dc:conformsTo. NOTE: The convention used by PDF Declarations is to use `#` as the only separator between the URI path and fragment components as shown in the example in 7.2