Merge branch 'picture' into pretty

Conflicts:
	librarian/dcparser.py

diff --combined librarian/__init__.py
index 2e515dd,42bc518..feb9974
--- 1/librarian/__init__.py
--- 2/librarian/__init__.py
+++ b/librarian/__init__.py
@@@ -138,9 -138,9 +138,9 @@@ class DocProvider(object)
          """Should return a file-like object with a WL document XML."""
          return self.by_slug_and_lang(slug)
  
-     def by_uri(self, uri):
+     def by_uri(self, uri, wluri=WLURI):
          """Should return a file-like object with a WL document XML."""
-         wluri = WLURI(uri)
+         wluri = wluri(uri)
          return self.by_slug_and_lang(wluri.slug, wluri.language)
  
  
@@@ -150,6 -150,7 +150,6 @@@ class DirDocProvider(DocProvider)
      def __init__(self, dir_):
          self.dir = dir_
          self.files = {}
 -        return super(DirDocProvider, self).__init__()
  
      def by_slug_and_lang(self, slug, lang=None):
          fname = WLURI.from_slug_and_lang(slug, lang).filename_stem() + '.xml'

diff --combined librarian/dcparser.py
index 57308c6,f5fd42a..69175e6
--- 1/librarian/dcparser.py
--- 2/librarian/dcparser.py
+++ b/librarian/dcparser.py
@@@ -118,39 -118,48 +118,48 @@@ class Field(object)
  
          return self.validate_value(f)
  
+     def __eq__(self, other):
+         if isinstance(other, Field) and other.name == self.name:
+             return True
+         return False
  
  
+ class DCInfo(type):
+     def __new__(meta, classname, bases, class_dict):
+         fields = class_dict['FIELDS']
+ 
+         for base in bases[::-1]:
+             if hasattr(base, 'FIELDS'):
+                 for field in base.FIELDS[::-1]:
+                     try:
+                         fields.index(field)
+                     except ValueError:
+                         fields = (field,) + fields
+ 
+         class_dict['FIELDS'] = fields
+         return super(DCInfo, meta).__new__(meta, classname, bases, class_dict)
+ 
+ 
+ class WorkInfo(object):
+     __metaclass__ = DCInfo
  
- class BookInfo(object):
      FIELDS = (
          Field( DCNS('creator'), 'author', as_person),
          Field( DCNS('title'), 'title'),
+         Field( DCNS('type'), 'type', required=False, multiple=True),
+ 
          Field( DCNS('subject.period'), 'epochs', salias='epoch', multiple=True),
          Field( DCNS('subject.type'), 'kinds', salias='kind', multiple=True),
          Field( DCNS('subject.genre'), 'genres', salias='genre', multiple=True),
-         Field( DCNS('audience'), 'audiences', salias='audience', multiple=True,
-                 required=False),
+ 
          Field( DCNS('date'), 'created_at', as_date),
          Field( DCNS('date.pd'), 'released_to_public_domain_at', as_date, required=False),
-         Field( DCNS('contributor.editor'), 'editors', \
-             as_person, salias='editor', multiple=True, default=[]),
-         Field( DCNS('contributor.translator'), 'translators', \
-             as_person,  salias='translator', multiple=True, default=[]),
-         Field( DCNS('contributor.technical_editor'), 'technical_editors',
-             as_person, salias='technical_editor', multiple=True, default=[]),
          Field( DCNS('publisher'), 'publisher'),
+ 
          Field( DCNS('source'), 'source_name', required=False),
          Field( DCNS('source.URL'), 'source_url', required=False),
          Field( DCNS('identifier.url'), 'url', WLURI),
-         Field( DCNS('relation.hasPart'), 'parts', WLURI, multiple=True, required=False),
-         Field( DCNS('rights.license'), 'license', required=False),
-         Field( DCNS('rights'), 'license_description'),
-         Field( DCNS('language'), 'language'),
-         Field( DCNS('description'), 'description', required=False),
-         Field( DCNS('relation.cover_image.url'), 'cover_url', required=False),
-         Field( DCNS('relation.cover_image.attribution'), 'cover_by', required=False),
-         Field( DCNS('relation.cover_image.source'), 'cover_source', required=False),
-     )
+         )
  
      @classmethod
      def from_string(cls, xml):
@@@ -189,7 -198,7 +198,7 @@@
      def from_element(cls, rdf_tag):
          # the tree is already parsed, so we don't need to worry about Expat errors
          field_dict = {}
-         desc = rdf_tag.find(".//" + RDFNS('Description') )
+         desc = rdf_tag.find(".//" + RDFNS('Description'))
  
          if desc is None:
              raise NoDublinCore("No DublinCore section found.")
@@@ -199,7 -208,7 +208,7 @@@
              fv.append(e.text)
              field_dict[e.tag] = fv
  
-         return cls( desc.attrib, field_dict )
+         return cls(desc.attrib, field_dict)
  
      def __init__(self, rdf_attrs, dc_fields):
          """rdf_attrs should be a dictionary-like object with any attributes of the RDF:Description.
@@@ -286,7 -295,6 +295,6 @@@
  
          return root
  
- 
      def serialize(self):
          rdf = {}
          rdf['about'] = { 'uri': RDFNS('about'), 'value': self.about }
@@@ -324,5 -332,24 +332,27 @@@
  
          return result
  
- def parse(file_name):
-     return BookInfo.from_file(file_name)
+ 
+ class BookInfo(WorkInfo):
+     FIELDS = (
+         Field( DCNS('audience'), 'audiences', salias='audience', multiple=True,
+                 required=False),
+         Field( DCNS('contributor.editor'), 'editors', \
+             as_person, salias='editor', multiple=True, default=[]),
+         Field( DCNS('contributor.translator'), 'translators', \
+             as_person,  salias='translator', multiple=True, default=[]),
+         Field( DCNS('contributor.technical_editor'), 'technical_editors',
+             as_person, salias='technical_editor', multiple=True, default=[]),
+         Field( DCNS('relation.hasPart'), 'parts', WLURI, multiple=True, required=False),
+         Field( DCNS('rights.license'), 'license', required=False),
+         Field( DCNS('rights'), 'license_description'),
+         Field( DCNS('language'), 'language'),
+         Field( DCNS('description'), 'description', required=False),
++        Field( DCNS('relation.cover_image.url'), 'cover_url', required=False),
++        Field( DCNS('relation.cover_image.attribution'), 'cover_by', required=False),
++        Field( DCNS('relation.cover_image.source'), 'cover_source', required=False),
+     )
+ 
+ 
+ def parse(file_name, cls=BookInfo):
+     return cls.from_file(file_name)