Several changes in an effort to support charge reversals. I can't imagine this is all working flawlessly, as I'm not quite sure how it even _should_ work.

git-svn-id: file:///svn-source/pmgr/branches/yafr_20090716@490 97e9348a-65ac-dc4b-aefc-98561f571b83

db/schema.sql

@@ -961,10 +961,15 @@ DROP TABLE IF EXISTS `pmgr_transactions`;
 CREATE TABLE `pmgr_transactions` (
   `id`                   INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
 
-  `type`                 ENUM('INVOICE',
-                              'RECEIPT',
-			      'VOUCHER',
-                              'DEPOSIT', -- Probably should use VOUCHER for DEPOSIT
+  -- REVISIT <AP>: 20090804
+  --  I'm not sure about most of these terms.
+  --  Just as long as they're distinct though... I can rename them later
+  `type`                 ENUM('INVOICE', -- Sales Invoice
+                              'RECEIPT', -- Actual receipt of monies
+			      'PURCHASE_INVOICE', -- Committment to pay
+			      'CREDIT_NOTE', -- Inverse of Sales Invoice
+			      'PAYMENT', -- Actual payment
+                              'DEPOSIT',
                               'CLOSE',   -- Essentially an internal (not accounting) transaction
 --                               'CREDIT',
 --                               'REFUND',
@@ -1066,11 +1071,16 @@ DROP TABLE IF EXISTS `pmgr_statement_entries`;
 CREATE TABLE `pmgr_statement_entries` (
   `id`                   INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
 
-  `type`                 ENUM('CHARGE',
-			      'DISBURSEMENT',
-                              'VOUCHER-PAYMENT', -- REVISIT: Make PAYMENT
-                              'SURPLUS',
-                              'WAIVER',
+  -- REVISIT <AP>: 20090804
+  --  I'm not sure about most of these terms.
+  --  Just as long as they're distinct though... I can rename them later
+  `type`                 ENUM('CHARGE',        -- Invoiced Charge to Customer
+			      'DISBURSEMENT',  -- Disbursement of Receipt Funds
+                              'REVERSAL',      -- Reversal of a charge
+                              'VOUCHER',       -- Agreement to pay
+                              'PAYMENT',       -- Payment of a Voucher
+                              'SURPLUS',       -- Surplus Receipt Funds
+                              'WAIVER',        -- Waived Charge
 			      -- REVISIT <AP>: 20090730
 			      --  VOID is used for handling NSF and perhaps charge reversals.
 			      --  It's not clear this is the best way to handle these things.