diff --git a/sample_discovercard/mapping.md b/sample_discovercard/mapping.md
index 5999f92..3322020 100644
--- a/sample_discovercard/mapping.md
+++ b/sample_discovercard/mapping.md
@@ -1,3 +1,59 @@
+
+
+regular expression screen
+---------------------------------------------
+
+```
+                     +------------------------+----+
+          source     | DCARD                  | \/ |
+                     +-----------------------------+
+                     +-----------------------------+
+          new name   |First 20                     |
+                     +-----------------------------+
+                     +-----------------------------+
+          function   | extract(replace)       | \/ |
+                     +------------------------+----+
+
+
+
+         (each block is a regex, all blocks are concatenated into an array and linked to mapped ^alues)
+
+          first 20 characters
+         +----------------------------------+
+
+                   +----------------------------------------------------------------------------------------------------+
+            +      |                      +-----------------------------+                                               |
+            |      |            Field Name| Description             | \/|  expressed as jsonb path "{Description}")     |
+        +-------+  |                      +-----------------------------+                                               |
+            |      |                      +-------------------------+                                                   |
+            +      |label of return ^alue |f20                      |                                                   |
+                   |                      +-------------------------+                                                   |
+                   |                      +-------------------------+                                                   |
+                   |  regular expression  |.{1,20}                  |   supply test run ^alues                          |
+                   |                      +-------------------------+                                                   |
+                   |                      +-------------------------+                                                   |
+                   |          replace wit |                         |                                                   |
+                   |                      +-------------------------+                                                   |
+                   |                      +---+                                                                         |
+                   |           Map Results|Y/N|                                                                         |
+                   |                      +---+                                                                         |
+                   |                      +---+                                                                         |
+                   |      Find All Matches| g |                                                                         |
+                   |                      +---+                                                                         |
+                   |       filter(s)                                                                                    |
+                   |    +-------------------------------------------+                                                   |
+                   |      +----------------+ +----------------+                                                         |
+                   |      |Category        | |Restaurantes    |                                                         |
+                   |      +----------------+ +----------------+                                                         |
+                   |      +----------------+ +----------------+                                                         |
+                   |      |Category        | |Services        |                                                         |
+                   |      +----------------+ +----------------+                                                         |
+                   |                                                                                                    |
+                   +----------------------------------------------------------------------------------------------------+
+
+```
+
+
 map definition
 ----------------------------------------------------------
 
@@ -6,7 +62,7 @@ map definition
             {
                 "key": "{Description}",
                 "map": "y",
-                "flag": "",
+                "flag": "g",
                 "field": "f20",
                 "regex": ".{1,20}",
                 "retain": "y"
@@ -14,24 +70,29 @@ map definition
         ],
         "name": "First 20",
         "where": [
-            {
-            }
+            {"Category":"Restaurantes"},
+            {"Category":"Services"}
         ],
         "function": "extract",
         "description": "pull first 20 characters from description for mapping"
     }
 
-assign values to the result of the regex
------------------------------------------------------
 
 
-| retval                          | map                                                                                 |
-| ------------------------------- | ----------------------------------------------------------------------------------- |
-| {"f20": "BIG LOTS #00453 STOW"} | {"party": "Big Lots", "reason": "Home Supplies"}                                    |
-| {"f20": "1794MOTHERHOOD #1794"} | {"party": "Motherhood", "reason": "Clothes"}                                        |
-| {"f20": "3 PALMS HUDSON OH"}    | {"city": "Hudson", "party": "3 Palms", "reason": "Restaurante", "province": "Ohio"} |
-| {"f20": "36241 7-ELEVEN STOW "} | {"city": "Stow", "party": "7-Eleven", "reason": "Gasoline", "province": "Ohio"}     |
-| {"f20": "7-ELEVEN 36241 STOW "} | {"city": "Stow", "party": "7-Eleven", "reason": "Gasoline", "province": "Ohio"}     |
-| {"f20": "98626 - 200 PUBLIC S"} | {"party": "Public Square Parking Garage", "reason": "Recreation"}                   |
-| {"f20": "ACE HARDWARE HUDSON "} | {"party": "Ace Hardware", "reason": "Home Maintenance"}                             |
-| {"f20": "ACH CAFE AND STARBUC"} | {"party": "Starbucks", "reason": "Restaurante"}                                     |
+assign new key/values to the results of the regular expression, and then back to the underlying row it came from
+-----------------------------------------------------------------------------------------------------------------
+
+```
++---------------------------------+------------------+---------------+---------------+-----------------+----------------+
+| returned from expression        | party            | reason        | city          | provice         |                |
++-----------------------------------------------------------------------------------------------------------------------+
+| {"f20": "BIG LOTS #00453 STOW"} | Big Lots         |Home Supplies  |Stow           |Ohio             |                |
+| {"f20": "1794MOTHERHOOD #1794"} | Motherhood       |Clothes        |               |                 |                |
+| {"f20": "3 PALMS HUDSON OH"}    | 3 Palms          |Restaurantes   |Hudson         |Ohio             |                |
+| {"f20": "36241 7-ELEVEN STOW "} | 7-Ele^en         |Gasoline       |Stow           |Ohio             |                |
+| {"f20": "7-ELEVEN 36241 STOW "} | 7-Eleven         |Gasoline       |Stow           |Ohio             |                |
+| {"f20": "98626 - 200 PUBLIC S"} | Public Sq Parking|Recreation     |               |                 |                |
+| {"f20": "ACE HARDWARE HUDSON "} | Ace Hardware     |Home Maint     |Hudson         |Ohio             |                |
+| {"f20": "ACH CAFE AND STARBUC"} | Starbucks        |Restaurantes   |               |                 |                |
++---------------------------------+----------------------------------+---------------+-----------------+----------------+
+```
\ No newline at end of file