1. The UDC system is not used very much in North America.
2. The UDC is
rarely available in CIPs or in pre-recorded records such as the LC
catalogue or the OCLC database.
3. The UDC lacks
conformity.
4. The UDC exhibits
a lack of uniformity across libraries that use it.
5. The UDC is
uneven in its coverage of modern topics.
6. Some of the
expansions of UDC are too detailed.
7. The UDC is generally not
applied in a standard fashion.
8. Some of the present
UDC notations are clumsy and lengthy.
9. There is a
general lack of synthesis which leads to a repetition of base numbers in
the colon combinations at times.
