# vlerq(n) 4 vlerq "Vlerq data manipulation core engine"

## NAME

vlerq - The engine used by the Ratcl extension

## TABLE OF CONTENTS

TABLE OF CONTENTS
SYNOPSIS
DESCRIPTION
COMMANDS
EXAMPLE
SEE ALSO
KEYWORDS

## SYNOPSIS

package require vlerq ?4?

vlerq command ...
vlerq open filename

## DESCRIPTION

The vlerq package provides commands used by the Ratcl extension to implement a general-purpose relational algebra and persistence framework.

## COMMANDS

vlerq command ...
  The vlerq command wraps all the different sub-commands provided by the vlerq package.
vlerq open filename
  The open sub-command opens a Metakit-compatible datafile and returns its root view.

THIS DOCUMENTATION NEEDS TO BE FINISHED

## EXAMPLE

    package require vlerq
    set v [vlerq open myfile.db]
    puts [vlerq names $v]

This lists all the sub-views available in the myfile.db file.

## SEE ALSO

metakit, ratcl

## KEYWORDS

algebra, database, persistence, relational