/*
 * xmltables.sql -- Create or replace tables for storing XML in the db
 *
 *      Purpose: creates tables needed for XML database
 * 
 *      Created: 12 September 1999
 *       Author: Matt Jones
 * Organization: National Center for Ecological Analysis and Synthesis
 *      Version: '$Id: xmltables.sql 4 1999-09-12 20:11:29Z jones $'
 *
 */

/* 
 * Documents -- table to store XML document catalog
 */
DROP TABLE documents;
CREATE TABLE documents (
	docid		NUMBER(20),
	rootnodeid	NUMBER(20),
	docname		VARCHAR2(1000),
	doctype		VARCHAR2(1000),
	date_created	DATE,
	date_updated	DATE,
   CONSTRAINT document_pk PRIMARY KEY (docid),
   CONSTRAINT fk_root_node FOREIGN KEY (rootnodeid) REFERENCES elements
);

/* 
 * Elements -- table to store XML Elements
 */
DROP TABLE elements;
CREATE TABLE elements (
	nodeid		NUMBER(20),
	nodename	VARCHAR2(2000),
	nodedata	VARCHAR2(2000),
	date_created	DATE,
	date_updated	DATE,
   CONSTRAINT elements_pk PRIMARY KEY (nodeid)
);

/* 
 * Attributes -- table to store XML Attributes
 */
DROP TABLE attributes;
CREATE TABLE attributes (
	attributeid	NUMBER(20),
	nodeid		NUMBER(20),
	attributenumber	NUMBER(20),
	attributename	VARCHAR2(2000),
	attributevalue	VARCHAR2(2000),
	date_created	DATE,
	date_updated	DATE,
   CONSTRAINT KEY (attributeid),
   CONSTRAINT fk_parent_node FOREIGN KEY (nodeid) REFERENCES elements
);