-- Migration from 056 to 057\012\012-- Introduction of a new data type - XML.\012\012INSERT INTO data_types (id, code, description) VALUES (nextval('data_type_id_seq'), 'XML', 'XML document');\012\012-- Property types of XML data type can optionally hold XMLSchema and XSLT. \012\012CREATE DOMAIN text_value AS text;\012\012ALTER TABLE property_types ADD COLUMN schema text_value;\012ALTER TABLE property_types ADD COLUMN transformation text_value;\012\012-- Remove length restriction for property values - change domain from generic_value to text_value.\012ALTER TABLE data_set_properties ALTER COLUMN value TYPE text_value;\012ALTER TABLE experiment_properties ALTER COLUMN value TYPE text_value;\012ALTER TABLE material_properties ALTER COLUMN value TYPE text_value;\012ALTER TABLE sample_properties ALTER COLUMN value TYPE text_value;\012DROP DOMAIN generic_value;\012