Do you or your students have trouble identifying standard subdivisions in add tables in WebDewey? We’ll show three approaches to identifying them—and look at the MARC field that makes the approaches possible.
Some add tables have no standard subdivisions; all the add table notation begins with non-zero digits, and none of that add table notation has a standard subdivision added to it, e.g., the add table at 633-635 Specific plant crops. Some add tables have a main set of standard subdivisions that begins with a single zero, and all the other add table numbers begin with non-zero digits, e.g., the add table at 362-363 Specific social problems and services. In other add tables, the main set of standard subdivisions must begin with two zeros because other add table numbers begin with a single zero, e.g., the add table at 616.1-616.9 Specific diseases. See this post for a discussion of how many zeros are needed for standard subdivisions. Just as in the schedules, standard subdivisions in add tables may be listed to introduce an expansion featuring special notation, e.g., in the add table at 721-729 Specific aspects of architecture. The subdivisions in the expansion are not standard subdivisions. See this post for a discussion of modified standard subdivisions.
First approach: Create a list of all the standard subdivisions in an add table
The first approach takes advantage of the ability to search on number components in WebDewey described in this post. First, click Advanced Search. In these searches, the asterisk (*) is a truncation symbol. A search for 616.1-616.9* in Dewey Numbers AND T1--0* in Number Components retrieves 18 records:
As explained in this post, an individual record for a specific number in an add table can be expressed with numbers for the location of the add table (in this case, 616.1-616.9) followed by a colon followed by the notation in the add table. The first 16 records are for the main set of standard subdivisions in the add table, all beginning with two zeros. The seventeenth record is for 616.1-616.9:/06 Therapy (not a standard subdivision) plus standard subdivision T1—0724 Experimental research. The forward slash in 616.1-616.9:/060724 is a segmentation mark. The eighteenth record is for 616.1-616.9:/061 Drug therapy (not a standard subdivision) plus standard subdivision T1—0724 Experimental research.
A search for 721-729* in Dewey Numbers AND T1--0* in Number Components retrieves 7 records:
The first record retrieved (721-729:/01 Philosophy and theory) has this note:
Notation T1--01 from Table 1 as modified below.
The subordinate entry (721-729:/0103-/0108 Special topics) was not retrieved in the search for standard subdivisions because it is not a standard subdivision.
The fourth record retrieved (721-729:/028 Auxiliary techniques and procedures; apparatus, equipment, materials) has this note:
Notation T1--028 from Table 1 as modified below
The subordinate entry (721-729:/0286 Remodeling) was not retrieved in the search for standard subdivisions because it is not a standard subdivision.
Similarly, the entry 721-729:/04 Special topics was not retrieved because T1--04 Special topics is a non-standard feature in Table 1; it is used only when specifically set forth in the schedules and has meaning only as specified where it appears. It is not treated like regular standard subdivisions; for example, other standard subdivisions may be added as required. WebDewey does not treat it as a number component.
Second approach: Check the status of a specific entry
The second approach involves going to the individual record for a specific number in an add table and checking its Synthesized number components box. For example, in the add table at 616.1-616.9 Specific diseases, if you click the first entry, you go to the record for 616.1-616.9:001 Philosophy and theory. That record has a Synthesized number components box showing that the entry is based on notation from Table 1:
This approach does not work with number spans, because WebDewey never gives a Synthesized number components box for number spans. But that is no problem if the caption for the span is simply “Standard subdivisions” as for 616.1-616.9:003-006 Standard subdivisions.
Third approach: Check the MARC 765 Synthesized Number Components field
If you really, really, really want to check whether the entry 616.1-616.9:003-006 Standard subdivisions is based on notation from Table 1, click the MARC button to get the MARC record display for that entry. Here is the MARC record display for 616.1-616.9:003-006 Standard subdivisions:
The first 765 Synthesized Number Components field shows that the first number in the span was built with a facet designator ($f) 0 plus Table 1 ($z 1) digits ($s) 03. The second 765 field shows that the second number in the span was built with a facet designator ($f) 0 plus Table 1 ($z 1) digits ($s) 06. These 765 fields make it possible to retrieve 616.1-616.9:003-006 Standard subdivisions with a search for 616.1-616.9* in Dewey Numbers AND T1--0* in Number Components. The non-span record for 616.1-616.9:001 Philosophy and theory has one 765 field:
765 0# $f 0 $z 1 $s 01 $w 616.1 $c 616.9 $y 1 $u 001
That 765 field makes it possible to retrieve 616.1-616.9:001 Philosophy and theory with a search for 616.1-616.9* in Dewey Numbers AND T1--0* in Number Components. It also makes possible the Synthesized number components box shown above. For more information about the MARC 765 field, see this site.
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