HP StorageWorks Reference Information Storage System V1.1 User Guide (February 2005)

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Chapter 6: Query syntax and matching Query fields and expressions
6-2 HP StorageWorks Reference Information Storage System User Guide, February 2005
Query fields and expressions
The words query and search are used interchangeably in this guide. The act of
querying consists of submitting a query. A query is a set of query
fields that
contain the search criteria you have entered. When you submit a query, the
system matches the query against all documents of the type you specify (files
or email messages) in the repository you are searching.
Different query fields represent different types of information. They corre-
spond to different fields in a document. For example, when searching for
email messages, the query field
From corresponds to the message field From
and represents the message sender. The available fields are different for email
messages and files. For example, the
From field is only available for message
searches. The file
Extension field is only available for file searches.
During querying, query fields are checked against the corresponding fields of
archived documents to see if there is a match. For a document to
match a
query, its fields must match all of the corresponding query fields. For
example, if the
Subject field of an email message matches the Subject field of a
query, but the
From fields of the two do not match, the message and the query
do not match.
Most query fields are text fields. A few, such as dates, are numerical. An
empty query field, whether text or non-text, matches any document field. A
non-text field is checked against archived documents using numerical
comparisons appropriate to the field. For example, the date range of a
message query is compared with the dates candidate messages were sent.
Fill text fields with query
expressions that represent what you are searching.
The expressions serve as patterns to be matched against corresponding fields
of archived documents. The matching operation is the same for all text fields.