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- Processing Address Lists in Icon
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- Ralph E. Griswold
- Department of Computer Science, The University of Arizona
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- Introduction
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- Version 8.1 of the Icon program library contains a collection
- of programs for processing address lists. These programs check
- the correctness of address lists, filter them for designated
- entries, sort them, and format mailing labels.
-
- The format of addresses lists processed by these programs is
- loosely structured. This allows such lists to be created and
- maintained using any text editor and allows them to be used for a
- variety of purposes (not just for addresses, although that term
- is used here for simplicity). The lack of structure, on the other
- hand, allows ambiguities and the possibility of incorrectly
- organized data. These programs are no substitute for a database
- system or an application specifically dedicated to the handling
- of mailing lists.
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- Address_List_Format
-
- An address list, in the sense the term is used here, is a
- sequence of entries. Each entry begins with a header line, in
- which the first character is a #. Subsequent lines contain the
- address information in a natural format with a few constraints
- that are necessary if some of the programs described in the next
- section are to be used. For example, an address list might look
- like this:
-
- #
- Mr. Fred Burfle
- 1010 Wayside Lane
- Scottsdale, AZ 85254
- #
- Prof. M. Elwood Mork
- 5235 Courtland Blvd., Apt. 23
- Minneapolis, MN 55432
- .
- .
- .
-
-
- Since a # at the beginning of a line constitutes a header, a #
- cannot appear as the first character of a line in an entry. One
- work-around for this problem is to put a blank in front of a #
- that otherwise would appear at the beginning of a line in an
- entry.
-
- Within an entry, a line whose first character is a * is con-
- sidered to be a comment and is not treated as significant text.
- For example, such comment lines are ignored when formatting
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- IPD171 - 1 - September 4, 1991
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- mailing labels. Comment lines can be used for information like
- telephone numbers.
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- The # that starts a header line can be followed by one or more
- designator characters. Several of the programs can select only
- those entries with specific designators.
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- The choice of designator characters is up to the user. For
- example, #a might be used to designate active accounts, while #b
- might be used to designate bad addresses.
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- Organization_of_Entry_Information
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- Some of the programs that process address lists expect the
- entries to be in a specific form. For example, the first line of
- an entry (after the header) is expected to be a name if the entry
- is an actual address.
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- Similarly, for addresses in the United States, the last line
- of an entry is expected to be the city, followed by a comma, fol-
- lowed by the postal-code abbreviation for the state, followed by
- one or more blanks, followed by the ZIP code. See the examples
- above.
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- For an address outside the United States, the last line is
- expected to consist only of the country name, in all uppercase
- letters.
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- Programs
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- The following programs are available for processing address
- lists:
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- adlcheck Checks lists for bad data. Options include checking
- the state and ZIP code (U.S. only), country name,
- and for fitting in the confines of a standard one-
- up mailing label.
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- adlcount Counts the number of labels in a list with optional
- restriction to entries with specified designators.
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- adlfiltr Filters a list, outputting only those entries with
- specified designators.
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- adllist Lists ``fields'' of address list entries, including
- addressee name, city, state, ZIP code, and country.
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- adlsort Sorts address list entries by addressee name, ZIP
- code, or country.
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- labels Produces one-up mailing labels for designated
- entries.
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- See the programs themselves for detailed documentation.
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- IPD171 - 2 - September 4, 1991
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