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parameter
- A variable value that can be specified when issuing a command or calling
an intrinsic;
- A variable designated to pass or return information through executable
routines, such as the OmniAccess routines.
parent key
- the column within a parent table that uniquely identifies rows or
records containing the same values.
- Also known as Primary Key.
- See also: key
parent table
- a table where any row is uniquely identifiable by the contents of
a single field (a key); Parent tables are often superior to child tables,
typically in a one-to-many relationship.
parsing
- separating a character string into individual keywords.
partial-key retrieval
- refers to an ASK Index or MDK Index retrieval where a partially specified
search argument is used to retrieve one or more records.
partitioning
- the dividing or grouping of data in a database across storage media
such as a disk drive, or across nodes in a distributed computer or network
environment in order to speed processes by concurrently processing I/O.
path
- information included with a file name that tells the location of the
file. How you specify a path is dependent on the operating system. In
MPE, a path is filename.group.account. In VAX/VMS, a path is node::device:[directory.subdirectory.subdirectory...]filename.
In UNIX, a path is directory/subdirectory/subdirectory/...filename.
pattern matching
- specifying wildcard notation, for example, asterisks (*), pound signs
(#), percent symbols(%), and so on, in a value which represents single
or multiple characters in that value.
port
- in a computer network, an identifying number that supports transport
between a server and one of several clients.
POSIX
- Portable Operating System Interface for UNIX; a portability standard
developed by the Institute of Electrical and Electronics Engineers (IEEE)
for the UNIX operating system.
prejoined tables
- tables that were linked together during OMNIDEX installation using
KEY values declared in the OMNIDEX environment catalog. Prejoining tables
optimizes OMNIDEX join operations between them.
progressively qualifying
- performing several keyword searches in succession against the same
table to narrow the qualified subset of rows. Also called a "drill-down"
search.
protocol
- a set of rules describing how to transmit data, especially across
a network.
PSE
- Professional Services Engineer; a representative of DISC who provides
database design and OMNIDEX implementation consulting expertise to DISC
customers.
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