We were asked, "Why are there colons in some numbers in WebDewey? Is that a glitch?" No, those numbers represent add table notation; the part before the colon gives the DDC number or number span where the add table is located, and the part following the colon represents the notation in the add table. For example, a search in All Fields for "drug therapy" will produce a long list of search results that includes:
616.1-616.9:061 Drug therapy
If you click that entry in the search results, you will see the add table under 616.1-616.9
Specific diseases displayed as a complete table, much as in the printed book. Because it is a large add table, you will need to scroll down to see the specific add table entry in that print-like display:
061 Drug therapy
Because you have already seen the entry 616.1-616.9:061 Drug therapy in your search results, you know where to look as you scroll down in the add table.
Alternatively, since you already know what add table entry you seek, you could use the hierarchy display at the left of the screen to drill down to 616.1-616.9:061 Drug therapy. Or if you have scrolled down in the display of the full add table and find the full add table with all its entries and notes a bit overwhelming, you could use the hierarchy display to focus on the entries in the upward hierarchy that are relevant to drug therapy. If you click the 061 link in the add table display in WebDewey, you can see 616.1-616.9:061 Drug therapy displayed as a separate record, with its own upward and downward hierarchy, including broader or narrower add table entries. Here are the add table entries in the hierarchy for 616.1-616.9:061 Drug therapy:
616.1-616.9:05-09 Preventive measures, therapy, pathology, psychosomatic medicine, case histories
616.1-616.9:06 Therapy
616.1-616.9:061-069 Specific therapies
616.1-616.9:061 Drug therapy
616.1-616.9:0610724 Experimental research
If you click the entries in the upward hierarchy, you will find notes with hierarchical force in each one. Those same notes appear also in the print-like display of the full add table; you can choose which way seems most convenient to find them.
For browsing DDC numbers, you also have a choice: show the add table notation as separate entries in the browse results, or hide the add table notation and show only the DDC number or number span where the add table is located. To hide the add table notation, click Preferences, then under Add Table Notation Options click Hide. Then if you browse for 616.1 the entire add table will be represented by one line:
616.1-616.9 Specific diseases
If you click Show, then browse for 616.1, the add table notation will be represented by many separate lines, beginning with standard subdivisions:
616.1-616.9:001 Philosophy and theory
616.1-616.9:002 Miscellany
616.1-616.9:[0023] The subject as a profession, occupation, hobby
616.1-616.9:0028 Auxiliary techniques and procedures; apparatus, equipment, materials
616.1-616.9:00284 Apparatus, equipment, materials
616.1-616.9:[00287] Testing and measurement
616.1-616.9:003-006 Standard subdivisions
If you frequently use a particular add table and know approximately what add table notation you seek, you can use the form of notation with the colon as a search or browse term. For example, you can search the Dewey Numbers index with 616.1-616.9:06* (the asterisk is a truncation symbol) and get six add table entries all relating to therapy. Similarly, you can browse in Dewey Numbers (with Captions) for 616.1-616.9:06 (no truncation symbol needed for browsing) and see a display that begins:
616.1-616.9:05 Preventive measures
616.1-616.9:06 Therapy
616.1-616.9:060724 Experimental research
616.1-616.9:061-069 Specific therapies
616.1-616.9:061 Drug therapy
616.1-616.9:0610724 Experimental research
616.1-616.9:062-069 Other therapies
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