TCRD v4.*
===================
This README describes changes from v3.2.2. As with all major version
udates, the database has been completely rebuilt from scratch. In
addition, a few schema changes have been made as detailed below.

The first release TCRD v4 is v4.3.2.

Provenance
--------
The biggest change in v4 is that the provenance of all TCRD data is now
stored.
- Added provenance table:
mysql> desc provenance;
+--------------+--------------+------+-----+---------+----------------+
| Field        | Type         | Null | Key | Default | Extra          |
+--------------+--------------+------+-----+---------+----------------+
| id           | int(11)      | NO   | PRI | NULL    | auto_increment |
| dataset_id   | int(11)      | NO   | MUL | NULL    |                |
| table_name   | varchar(255) | NO   |     | NULL    |                |
| column_name  | varchar(255) | YES  |     | NULL    |                |
| where_clause | text         | YES  |     | NULL    |                |
| comment      | text         | YES  |     | NULL    |                |
+--------------+--------------+------+-----+---------+----------------+
- Added dataset_id foreign key to xref and alias tables;


Disease and Grant Info
----------------------
- The table target2disese was renamed disease.
- The table target2grant was renamed grant.
- Foreign keys to protein were added to both disease and grant tables.
- Grant info is now included from 2000-2015 instead of 2010-2015.


Target Family Designations
--------------------------
- Removed target.idgfam column.
- Added and populated target.fam and target.famext columns.
These family designations correspond to what is in the NRDD manuscript
and are - or will be shortly - in sync with DTO.