diff --git a/src/calibre/__init__.py b/src/calibre/__init__.py
index fe140df032..cb3c05c7b9 100644
--- a/src/calibre/__init__.py
+++ b/src/calibre/__init__.py
@@ -2,7 +2,9 @@
 __license__   = 'GPL v3'
 __copyright__ = '2008, Kovid Goyal <kovid@kovidgoyal.net>'
 __docformat__ = 'restructuredtext en'
-import sys, os, re, logging, time, subprocess, atexit, mimetypes
+import sys, os, re, logging, time, subprocess, atexit, mimetypes, \
+       __builtin__
+__builtin__.__dict__['dynamic_property'] = lambda(func): func(None)
 from htmlentitydefs import name2codepoint
 from math import floor
 from logging import Formatter
diff --git a/src/calibre/devices/libusb.py b/src/calibre/devices/libusb.py
index 226a99f239..09261e10c5 100644
--- a/src/calibre/devices/libusb.py
+++ b/src/calibre/devices/libusb.py
@@ -116,8 +116,8 @@ class Device(Structure):
             raise Error("Cannot open device")
         return handle.contents    
     
-    @apply
-    def configurations():
+    @dynamic_property
+    def configurations(self):
         doc = """ List of device configurations. See L{ConfigDescriptor} """
         def fget(self):
             ans = []
@@ -127,8 +127,8 @@ class Device(Structure):
         return property(doc=doc, fget=fget)
 
 class Bus(Structure):
-    @apply
-    def device_list():
+    @dynamic_property
+    def device_list(self):
         doc = \
         """ 
         Flat list of devices on this bus. 
@@ -360,4 +360,4 @@ def get_devices():
         for dev in devices:
             device = (dev.device_descriptor.idVendor, dev.device_descriptor.idProduct, dev.device_descriptor.bcdDevice)
             ans.append(device)
-    return ans
+    return ans
\ No newline at end of file
diff --git a/src/calibre/devices/prs500/books.py b/src/calibre/devices/prs500/books.py
index 6c57920487..d567511ec6 100644
--- a/src/calibre/devices/prs500/books.py
+++ b/src/calibre/devices/prs500/books.py
@@ -55,8 +55,8 @@ class Book(object):
     size         = book_metadata_field("size", formatter=int)
     # When setting this attribute you must use an epoch
     datetime     = book_metadata_field("date", formatter=strptime, setter=strftime)
-    @apply
-    def title_sorter():
+    @dynamic_property
+    def title_sorter(self):
         doc = '''String to sort the title. If absent, title is returned'''
         def fget(self):
             src = self.elem.getAttribute('titleSorter').strip()
@@ -67,8 +67,8 @@ class Book(object):
             self.elem.setAttribute('titleSorter', sortable_title(unicode(val)))
         return property(doc=doc, fget=fget, fset=fset)
     
-    @apply
-    def thumbnail():
+    @dynamic_property
+    def thumbnail(self):
         doc = \
         """ 
         The thumbnail. Should be a height 68 image. 
@@ -88,15 +88,15 @@ class Book(object):
                 return decode(rc)
         return property(fget=fget, doc=doc)
     
-    @apply
-    def path():
+    @dynamic_property
+    def path(self):
         doc = """ Absolute path to book on device. Setting not supported. """
         def fget(self):  
             return self.root + self.rpath
         return property(fget=fget, doc=doc)
     
-    @apply
-    def db_id():
+    @dynamic_property
+    def db_id(self):
         doc = '''The database id in the application database that this file corresponds to'''
         def fget(self):
             match = re.search(r'_(\d+)$', self.rpath.rpartition('.')[0])
@@ -378,4 +378,4 @@ class BookList(_BookList):
     
     def write(self, stream):
         """ Write XML representation of DOM tree to C{stream} """
-        stream.write(self.document.toxml('utf-8'))
+        stream.write(self.document.toxml('utf-8'))
\ No newline at end of file
diff --git a/src/calibre/devices/prs500/cli/main.py b/src/calibre/devices/prs500/cli/main.py
index dfd3eb1ed6..4a94bf41af 100755
--- a/src/calibre/devices/prs500/cli/main.py
+++ b/src/calibre/devices/prs500/cli/main.py
@@ -39,8 +39,8 @@ class FileFormatter(object):
         self.name        = file.name
         self.path        = file.path
     
-    @apply
-    def mode_string():
+    @dynamic_property
+    def mode_string(self):
         doc=""" The mode string for this file. There are only two modes read-only and read-write """
         def fget(self):
             mode, x = "-", "-"      
@@ -50,8 +50,8 @@ class FileFormatter(object):
             return mode
         return property(doc=doc, fget=fget)
     
-    @apply
-    def isdir_name():
+    @dynamic_property
+    def isdir_name(self):
         doc='''Return self.name + '/' if self is a directory'''
         def fget(self):
             name = self.name
@@ -61,8 +61,8 @@ class FileFormatter(object):
         return property(doc=doc, fget=fget)
             
     
-    @apply
-    def name_in_color():
+    @dynamic_property
+    def name_in_color(self):
         doc=""" The name in ANSI text. Directories are blue, ebooks are green """
         def fget(self):
             cname = self.name
@@ -75,22 +75,22 @@ class FileFormatter(object):
             return cname
         return property(doc=doc, fget=fget)
     
-    @apply
-    def human_readable_size():
+    @dynamic_property
+    def human_readable_size(self):
         doc=""" File size in human readable form """
         def fget(self):
             return human_readable(self.size)
         return property(doc=doc, fget=fget)
     
-    @apply
-    def modification_time():
+    @dynamic_property
+    def modification_time(self):
         doc=""" Last modified time in the Linux ls -l format """
         def fget(self):
             return time.strftime("%Y-%m-%d %H:%M", time.localtime(self.wtime))
         return property(doc=doc, fget=fget)
     
-    @apply
-    def creation_time():
+    @dynamic_property
+    def creation_time(self):
         doc=""" Last modified time in the Linux ls -l format """
         def fget(self):
             return time.strftime("%Y-%m-%d %H:%M", time.localtime(self.ctime))
@@ -334,4 +334,4 @@ def main():
     return 0
 
 if __name__ == '__main__':
-    main()
+    main()
\ No newline at end of file
diff --git a/src/calibre/devices/prs500/prstypes.py b/src/calibre/devices/prs500/prstypes.py
index 4e1294fc1c..3efbfcab31 100755
--- a/src/calibre/devices/prs500/prstypes.py
+++ b/src/calibre/devices/prs500/prstypes.py
@@ -284,8 +284,8 @@ class Command(TransferBuffer):
     # Length of the data part of this packet
     length = field(start=12, fmt=DWORD) 
     
-    @apply
-    def data():
+    @dynamic_property
+    def data(self):
         doc = \
         """ 
         The data part of this command. Returned/set as/by a TransferBuffer. 
@@ -447,8 +447,8 @@ class LongCommand(Command):
         self.length  = 16
         self.command = command
     
-    @apply
-    def command():
+    @dynamic_property
+    def command(self):
         doc = \
         """ 
         Usually carries extra information needed for the command
@@ -568,8 +568,8 @@ class FileOpen(PathCommand):
         PathCommand.__init__(self, path, FileOpen.NUMBER, path_len_at_byte=20)
         self.mode = mode
     
-    @apply
-    def mode():
+    @dynamic_property
+    def mode(self):
         doc = \
                     """ 
                     The file open mode. Is either L{FileOpen.READ} 
@@ -651,8 +651,8 @@ class Response(Command):
             raise PacketError("Response packets must have their number set to " \
             + hex(0x00001000))
     
-    @apply
-    def data():
+    @dynamic_property
+    def data(self):
         doc = \
                   """ 
                   The last 3 DWORDs (12 bytes) of data in this 
@@ -681,43 +681,43 @@ class ListResponse(Response):
     PATH_NOT_FOUND = 0xffffffd7 #: Queried path is not found 
     PERMISSION_DENIED = 0xffffffd6 #: Permission denied
     
-    @apply
-    def is_file():
+    @dynamic_property
+    def is_file(self):
         doc = """ True iff queried path is a file """
         def fget(self):      
             return self.code == ListResponse.IS_FILE
         return property(doc=doc, fget=fget)
     
-    @apply
-    def is_invalid():
+    @dynamic_property
+    def is_invalid(self):
         doc = """ True iff queried path is invalid """
         def fget(self):    
             return self.code == ListResponse.IS_INVALID
         return property(doc=doc, fget=fget)
     
-    @apply
-    def path_not_found():
+    @dynamic_property
+    def path_not_found(self):
         doc = """ True iff queried path is not found """
         def fget(self):    
             return self.code == ListResponse.PATH_NOT_FOUND
         return property(doc=doc, fget=fget)
     
-    @apply
-    def permission_denied():
+    @dynamic_property
+    def permission_denied(self):
         doc = """ True iff permission is denied for path operations """
         def fget(self):    
             return self.code == ListResponse.PERMISSION_DENIED
         return property(doc=doc, fget=fget)
     
-    @apply
-    def is_unmounted():
+    @dynamic_property
+    def is_unmounted(self):
         doc = """ True iff queried path is unmounted (i.e. removed storage card) """
         def fget(self):
             return self.code == ListResponse.IS_UNMOUNTED
         return property(doc=doc, fget=fget)
     
-    @apply
-    def is_eol():
+    @dynamic_property
+    def is_eol(self):
         doc = """ True iff there are no more items in the list """
         def fget(self):
             return self.code == ListResponse.IS_EOL
@@ -759,8 +759,8 @@ class FileProperties(Answer):
     # 0 = default permissions, 4 = read only
     permissions = field(start=36, fmt=DWORD)  
     
-    @apply
-    def is_dir():
+    @dynamic_property
+    def is_dir(self):
         doc = """True if path points to a directory, False if it points to a file."""    
         
         def fget(self):
@@ -776,8 +776,8 @@ class FileProperties(Answer):
         return property(doc=doc, fget=fget, fset=fset)
     
     
-    @apply
-    def is_readonly():
+    @dynamic_property
+    def is_readonly(self):
         doc = """ Whether this file is readonly."""
         
         def fget(self):
@@ -801,8 +801,8 @@ class IdAnswer(Answer):
     
     """ Defines the structure of packets that contain identifiers for queries. """
     
-    @apply
-    def id():
+    @dynamic_property
+    def id(self):
         doc = \
         """ 
         The identifier. C{unsigned int} stored in 4 bytes 
@@ -841,8 +841,8 @@ class ListAnswer(Answer):
     name_length = field(start=20, fmt=DWORD)
     name        = stringfield(name_length, start=24)
     
-    @apply
-    def is_dir():
+    @dynamic_property
+    def is_dir(self):
         doc = \
         """ 
         True if list item points to a directory, False if it points to a file.
@@ -859,4 +859,3 @@ class ListAnswer(Answer):
         
         return property(doc=doc, fget=fget, fset=fset)
 
-
diff --git a/src/calibre/devices/prs505/books.py b/src/calibre/devices/prs505/books.py
index b63b089fdd..53ab374613 100644
--- a/src/calibre/devices/prs505/books.py
+++ b/src/calibre/devices/prs505/books.py
@@ -64,8 +64,8 @@ class Book(object):
     # When setting this attribute you must use an epoch
     datetime     = book_metadata_field("date", formatter=strptime, setter=strftime)
     
-    @apply
-    def title_sorter():
+    @dynamic_property
+    def title_sorter(self):
         doc = '''String to sort the title. If absent, title is returned'''
         def fget(self):
             src = self.elem.getAttribute('titleSorter').strip()
@@ -76,8 +76,8 @@ class Book(object):
             self.elem.setAttribute('titleSorter', sortable_title(unicode(val)))
         return property(doc=doc, fget=fget, fset=fset)
     
-    @apply
-    def thumbnail():
+    @dynamic_property
+    def thumbnail(self):
         doc = \
         """ 
         The thumbnail. Should be a height 68 image. 
@@ -99,15 +99,15 @@ class Book(object):
                 return decode(rc)
         return property(fget=fget, doc=doc)
     
-    @apply
-    def path():
+    @dynamic_property
+    def path(self):
         doc = """ Absolute path to book on device. Setting not supported. """
         def fget(self):  
             return self.mountpath + self.rpath
         return property(fget=fget, doc=doc)
     
-    @apply
-    def db_id():
+    @dynamic_property
+    def db_id(self):
         doc = '''The database id in the application database that this file corresponds to'''
         def fget(self):
             match = re.search(r'_(\d+)$', self.rpath.rpartition('.')[0])
@@ -412,4 +412,4 @@ def fix_ids(main, card):
     regen_ids(main)
     regen_ids(card)
         
-    main.set_next_id(str(main.max_id()+1))
+    main.set_next_id(str(main.max_id()+1))
\ No newline at end of file
diff --git a/src/calibre/devices/usbms/books.py b/src/calibre/devices/usbms/books.py
index fffed41549..2875c04b88 100644
--- a/src/calibre/devices/usbms/books.py
+++ b/src/calibre/devices/usbms/books.py
@@ -21,15 +21,15 @@ class Book(object):
     def __eq__(self, other):
         return self.path == other.path
         
-    @apply
-    def title_sorter():
+    @dynamic_property
+    def title_sorter(self):
         doc = '''String to sort the title. If absent, title is returned'''
         def fget(self):
             return re.sub('^\s*A\s+|^\s*The\s+|^\s*An\s+', '', self.title).rstrip()
         return property(doc=doc, fget=fget)
     
-    @apply
-    def thumbnail():
+    @dynamic_property
+    def thumbnail(self):
         return None
         
     def __str__(self):
@@ -44,4 +44,3 @@ class BookList(_BookList):
     def set_tags(self, book, tags):
         pass
 
-
diff --git a/src/calibre/ebooks/html.py b/src/calibre/ebooks/html.py
index 9a273c42ce..5e87351375 100644
--- a/src/calibre/ebooks/html.py
+++ b/src/calibre/ebooks/html.py
@@ -31,8 +31,8 @@ from cssutils import CSSParser
 
 class HTMLElement(HtmlElement):
     
-    @apply
-    def specified_font_size():
+    @dynamic_property
+    def specified_font_size(self):
         
         def fget(self):
             ans = self.get('specified_font_size', '')
@@ -47,8 +47,8 @@ class HTMLElement(HtmlElement):
                      
         return property(fget=fget, fset=fset)
     
-    @apply
-    def computed_font_size():
+    @dynamic_property
+    def computed_font_size(self):
         def fget(self):
             ans = self.get('computed_font_size', '')
             if ans == '':
@@ -1148,4 +1148,4 @@ output  = %s
     
 
 if __name__ == '__main__':
-    sys.exit(main())
+    sys.exit(main())
\ No newline at end of file
diff --git a/src/calibre/ebooks/lrf/tags.py b/src/calibre/ebooks/lrf/tags.py
index c8ef312ae3..17db193e1a 100644
--- a/src/calibre/ebooks/lrf/tags.py
+++ b/src/calibre/ebooks/lrf/tags.py
@@ -207,32 +207,32 @@ class Tag(object):
         s += " at %08X, contents: %s" % (self.offset, repr(self.contents))
         return s
     
-    @apply
-    def byte():
+    @dynamic_property
+    def byte(self):
         def fget(self):
             if len(self.contents) != 1:
                 raise LRFParseError("Bad parameter for tag ID: %04X" % self.id)
             return struct.unpack("<B", self.contents)[0]
         return property(fget=fget)
     
-    @apply
-    def word():
+    @dynamic_property
+    def word(self):
         def fget(self):
             if len(self.contents) != 2:
                 raise LRFParseError("Bad parameter for tag ID: %04X" % self.id)
             return struct.unpack("<H", self.contents)[0]
         return property(fget=fget)
     
-    @apply
-    def sword():
+    @dynamic_property
+    def sword(self):
         def fget(self):
             if len(self.contents) != 2:
                 raise LRFParseError("Bad parameter for tag ID: %04X" % self.id)
             return struct.unpack("<h", self.contents)[0]
         return property(fget=fget)
     
-    @apply
-    def dword():
+    @dynamic_property
+    def dword(self):
         def fget(self):
             if len(self.contents) != 4:
                 raise LRFParseError("Bad parameter for tag ID: %04X" % self.id)
diff --git a/src/calibre/ebooks/metadata/opf.py b/src/calibre/ebooks/metadata/opf.py
index 83f8ce8faf..94264a285e 100644
--- a/src/calibre/ebooks/metadata/opf.py
+++ b/src/calibre/ebooks/metadata/opf.py
@@ -38,8 +38,8 @@ class ManifestItem(Resource):
                 res.mime_type = mt
             return res
     
-    @apply
-    def media_type():
+    @dynamic_property
+    def media_type(self):
         def fget(self):
             return self.mime_type
         def fset(self, val):
@@ -242,14 +242,14 @@ class OPF(MetaInformation):
     def __init__(self):
         raise NotImplementedError('Abstract base class')
     
-    @apply
-    def package():
+    @dynamic_property
+    def package(self):
         def fget(self):
             return self.soup.find(re.compile('package'))
         return property(fget=fget)
     
-    @apply
-    def metadata():
+    @dynamic_property
+    def metadata(self):
         def fget(self):
             return self.package.find(re.compile('metadata'))
         return property(fget=fget)
@@ -540,4 +540,4 @@ class OPFCreator(MetaInformation):
         if toc is not None and ncx_stream is not None:
             toc.render(ncx_stream, self.application_id)
             ncx_stream.flush()
-    
+    
\ No newline at end of file
diff --git a/src/calibre/ebooks/metadata/opf2.py b/src/calibre/ebooks/metadata/opf2.py
index 2dea59d64b..c64b567d0e 100644
--- a/src/calibre/ebooks/metadata/opf2.py
+++ b/src/calibre/ebooks/metadata/opf2.py
@@ -168,8 +168,8 @@ class ManifestItem(Resource):
                 res.mime_type = mt
             return res
 
-    @apply
-    def media_type():
+    @dynamic_property
+    def media_type(self):
         def fget(self):
             return self.mime_type
         def fset(self, val):
@@ -606,8 +606,8 @@ class OPF(object):
         for item in self.iterguide():
             item.set('href', get_href(item))
 
-    @apply
-    def authors():
+    @dynamic_property
+    def authors(self):
 
         def fget(self):
             ans = []
@@ -626,8 +626,8 @@ class OPF(object):
 
         return property(fget=fget, fset=fset)
 
-    @apply
-    def author_sort():
+    @dynamic_property
+    def author_sort(self):
 
         def fget(self):
             matches = self.authors_path(self.metadata)
@@ -649,8 +649,8 @@ class OPF(object):
 
         return property(fget=fget, fset=fset)
 
-    @apply
-    def title_sort():
+    @dynamic_property
+    def title_sort(self):
 
         def fget(self):
             matches = self.title_path(self.metadata)
@@ -672,8 +672,8 @@ class OPF(object):
 
         return property(fget=fget, fset=fset)
 
-    @apply
-    def title_sort():
+    @dynamic_property
+    def title_sort(self):
 
         def fget(self):
             matches = self.title_path(self.metadata)
@@ -692,8 +692,8 @@ class OPF(object):
 
         return property(fget=fget, fset=fset)
 
-    @apply
-    def tags():
+    @dynamic_property
+    def tags(self):
 
         def fget(self):
             ans = []
@@ -710,8 +710,8 @@ class OPF(object):
 
         return property(fget=fget, fset=fset)
 
-    @apply
-    def isbn():
+    @dynamic_property
+    def isbn(self):
 
         def fget(self):
             for match in self.isbn_path(self.metadata):
@@ -727,8 +727,8 @@ class OPF(object):
 
         return property(fget=fget, fset=fset)
 
-    @apply
-    def application_id():
+    @dynamic_property
+    def application_id(self):
 
         def fget(self):
             for match in self.application_id_path(self.metadata):
@@ -744,8 +744,8 @@ class OPF(object):
 
         return property(fget=fget, fset=fset)
 
-    @apply
-    def book_producer():
+    @dynamic_property
+    def book_producer(self):
 
         def fget(self):
             for match in self.bkp_path(self.metadata):
@@ -782,8 +782,8 @@ class OPF(object):
                             return cpath
 
 
-    @apply
-    def cover():
+    @dynamic_property
+    def cover(self):
 
         def fget(self):
             if self.guide is not None:
@@ -1034,4 +1034,4 @@ def suite():
     return unittest.TestLoader().loadTestsFromTestCase(OPFTest)
 
 def test():
-    unittest.TextTestRunner(verbosity=2).run(suite())
+    unittest.TextTestRunner(verbosity=2).run(suite())
\ No newline at end of file
diff --git a/src/calibre/ebooks/metadata/toc.py b/src/calibre/ebooks/metadata/toc.py
index e4f9161ebb..8ea73be478 100644
--- a/src/calibre/ebooks/metadata/toc.py
+++ b/src/calibre/ebooks/metadata/toc.py
@@ -86,8 +86,8 @@ class TOC(list):
             for i in obj.flat():
                 yield i
     
-    @apply
-    def abspath():
+    @dynamic_property
+    def abspath(self):
         doc='Return the file this toc entry points to as a absolute path to a file on the system.'
         def fget(self):
             if self.href is None:
@@ -208,4 +208,4 @@ class TOC(list):
         template = MarkupTemplate(ncx_template)
         raw = template.generate(uid=uid, toc=self, __appname__=__appname__)
         raw = raw.render(doctype=doctype)
-        stream.write(raw)
+        stream.write(raw)
\ No newline at end of file
diff --git a/src/calibre/ebooks/oeb/base.py b/src/calibre/ebooks/oeb/base.py
index 8eb73935a5..771a27a81a 100644
--- a/src/calibre/ebooks/oeb/base.py
+++ b/src/calibre/ebooks/oeb/base.py
@@ -424,8 +424,8 @@ class Metadata(object):
     def __getattr__(self, term):
         return self.items[term]
 
-    @apply
-    def _nsmap():
+    @dynamic_property
+    def _nsmap(self):
         def fget(self):
             nsmap = {}
             for term in self.items:
@@ -434,8 +434,8 @@ class Metadata(object):
             return nsmap
         return property(fget=fget)
     
-    @apply
-    def _opf1_nsmap():
+    @dynamic_property
+    def _opf1_nsmap(self):
         def fget(self):
             nsmap = self._nsmap
             for key, value in nsmap.items():
@@ -444,8 +444,8 @@ class Metadata(object):
             return nsmap
         return property(fget=fget)
     
-    @apply
-    def _opf2_nsmap():
+    @dynamic_property
+    def _opf2_nsmap(self):
         def fget(self):
             nsmap = self._nsmap
             nsmap.update(OPF2_NSMAP)
@@ -582,8 +582,8 @@ class Manifest(object):
                 etree.SubElement(data, XHTML('body'))
             return data
         
-        @apply
-        def data():
+        @dynamic_property
+        def data(self):
             def fget(self):
                 if self._data is not None:
                     return self._data
@@ -854,8 +854,8 @@ class Guide(object):
             return 'Reference(type=%r, title=%r, href=%r)' \
                 % (self.type, self.title, self.href)
         
-        @apply
-        def _order():
+        @dynamic_property
+        def _order(self):
             def fget(self):
                 return self.ORDER.get(self.type, self.type)
             return property(fget=fget)
@@ -865,8 +865,8 @@ class Guide(object):
                 return NotImplemented
             return cmp(self._order, other._order)
         
-        @apply
-        def item():
+        @dynamic_property
+        def item(self):
             def fget(self):
                 path = urldefrag(self.href)[0]
                 hrefs = self.oeb.manifest.hrefs
diff --git a/src/calibre/gui2/viewer/documentview.py b/src/calibre/gui2/viewer/documentview.py
index 6c1eca0061..c81085f5b7 100644
--- a/src/calibre/gui2/viewer/documentview.py
+++ b/src/calibre/gui2/viewer/documentview.py
@@ -197,14 +197,14 @@ class Document(QWebPage):
     def bookmark(self):
         return self.javascript('calculate_bookmark(%d)'%(self.ypos+25), 'string')
     
-    @apply
-    def at_bottom():
+    @dynamic_property
+    def at_bottom(self):
         def fget(self):
             return self.height - self.ypos <= self.window_height
         return property(fget=fget)
     
-    @apply
-    def at_top():
+    @dynamic_property
+    def at_top(self):
         def fget(self):
             return self.ypos <= 0
         return property(fget=fget)
@@ -213,32 +213,32 @@ class Document(QWebPage):
     def test(self):
         pass
     
-    @apply
-    def ypos():
+    @dynamic_property
+    def ypos(self):
         def fget(self):
             return self.javascript('window.pageYOffset', 'int')
         return property(fget=fget)
     
-    @apply
-    def window_height():
+    @dynamic_property
+    def window_height(self):
         def fget(self):
             return self.javascript('window.innerHeight', 'int')
         return property(fget=fget)
     
-    @apply
-    def window_width():
+    @dynamic_property
+    def window_width(self):
         def fget(self):
             return self.javascript('window.innerWidth', 'int')
         return property(fget=fget)
         
-    @apply
-    def xpos():
+    @dynamic_property
+    def xpos(self):
         def fget(self):
             return self.javascript('window.pageXOffset', 'int')
         return property(fget=fget)
     
-    @apply
-    def scroll_fraction():
+    @dynamic_property
+    def scroll_fraction(self):
         def fget(self):
             try:
                 return float(self.ypos)/(self.height-self.window_height)
@@ -246,20 +246,20 @@ class Document(QWebPage):
                 return 0.
         return property(fget=fget)
     
-    @apply
-    def hscroll_fraction():
+    @dynamic_property
+    def hscroll_fraction(self):
         def fget(self):
             return float(self.xpos)/self.width
         return property(fget=fget)
     
-    @apply
-    def height():
+    @dynamic_property
+    def height(self):
         def fget(self):
             return self.javascript('document.body.offsetHeight', 'int') # contentsSize gives inaccurate results
         return property(fget=fget)
     
-    @apply
-    def width():
+    @dynamic_property
+    def width(self):
         def fget(self):
             return self.mainFrame().contentsSize().width() # offsetWidth gives inaccurate results
         return property(fget=fget)
@@ -338,20 +338,20 @@ class DocumentView(QWebView):
     def sizeHint(self):
         return self._size_hint
     
-    @apply
-    def scroll_fraction():
+    @dynamic_property
+    def scroll_fraction(self):
         def fget(self):
             return self.document.scroll_fraction
         return property(fget=fget)
     
-    @apply
-    def hscroll_fraction():
+    @dynamic_property
+    def hscroll_fraction(self):
         def fget(self):
             return self.document.hscroll_fraction
         return property(fget=fget)
     
-    @apply
-    def content_size():
+    @dynamic_property
+    def content_size(self):
         def fget(self):
             return self.document.width, self.document.height
         return property(fget=fget)
diff --git a/src/calibre/library/database.py b/src/calibre/library/database.py
index 2979c95d26..cc9ad62f05 100644
--- a/src/calibre/library/database.py
+++ b/src/calibre/library/database.py
@@ -818,8 +818,8 @@ ALTER TABLE books ADD COLUMN isbn TEXT DEFAULT "" COLLATE NOCASE;
 #        _lock_file = None
         self.conn.close()
 
-    @apply
-    def user_version():
+    @dynamic_property
+    def user_version(self):
         doc = 'The user version of this database'
         def fget(self):
             return self.conn.get('pragma user_version;', all=False)
@@ -1670,4 +1670,4 @@ def text_to_tokens(text):
 
 if __name__ == '__main__':
     sqlite.enable_callback_tracebacks(True)
-    db = LibraryDatabase('/home/kovid/temp/library1.db.orig')
+    db = LibraryDatabase('/home/kovid/temp/library1.db.orig')
\ No newline at end of file
diff --git a/src/calibre/library/database2.py b/src/calibre/library/database2.py
index 4a2c669a25..b13906e9f3 100644
--- a/src/calibre/library/database2.py
+++ b/src/calibre/library/database2.py
@@ -311,8 +311,8 @@ class LibraryDatabase2(LibraryDatabase):
     An ebook metadata database that stores references to ebook files on disk.
     '''
     PATH_LIMIT = 40 if 'win32' in sys.platform else 100
-    @apply
-    def user_version():
+    @dynamic_property
+    def user_version(self):
         doc = 'The user version of this database'
         
         def fget(self):
@@ -1323,4 +1323,4 @@ books_series_link      feeds
         progress.reset()
         return len(books)
         
-        
+        
\ No newline at end of file