User Guide

Using Internet queries 587
To search for a wildcard string that includes the literal backquote character (`) you must use two
backquote characters together and surround the entire string in back quotation marks:
`*n``t`
You can use paired back quotation marks or backslashes to escape special characters. There is no
functional difference between the two. For example, you can query for the term: <DDA> using
\<DDA\> or `<DDA>` as your search term.
Using natural queries
The Natural parser supports searching for similar documents, a search method sometimes referred
to as similarity searching. The Natural parser supports searching the full text of documents only.
The Natural parser does not support searching collection fields and zones. The Natural parser
does not support Verity query language except for topics.
Note: The Verity products and documentation refer to the Natural parser as the Query-By-Example
parser, as well as the Free Text parser.
Meaningful words are automatically treated as if they were preceded by the MANY modifier and
the STEM operator. By implicitly applying the STEM operator, the search engine searches not
only for the meaningful words themselves, but also for words that have the same stem. By
implicitly applying the MANY modifier, Verity calculates each document’s score based on the
word density it finds for meaningful words; the denser the occurrences of a word in a document,
the higher the document’s score.
By default, common words (such as the, has, and for) are stripped away, and the query is built
based on the more significant words (such as personnel, interns, schools, and mentors). Therefore,
the results of a natural language search are likely to be less precise than a search performed using
the simple or explicit parser.
The Natural parser interprets topic names as topic objects. This means that if the specified text
block contains a topic name, the query expression represented by the topic is considered in the
search.
Using Internet queries
With the Internet query parser, users can search entire documents or parts of documents (zones
and fields) entering words, phrases, and plain language similar to that used by many web search
engines. ColdFusion MX supports two Internet query parsers in the
cfsearch type attribute.
Internet Uses standard, web-style query syntax. For more information, see “Query syntax”
on page 589.
Internet_basic Similar to Internet. This query parser enhances performance, but produces less
accurate relevancy statistics.
Note: Verity also includes the Internet_BasicWeb and Internet_AdvancedWeb query parsers, which
are not directly supported by ColdFusion MX.