Rephrased documentation

docs/configuration.md

@@ -1172,22 +1172,41 @@ assigns or creates tags if a properly formatted barcode is detected.
 
     Defaults to false.
 
-#### [`CONSUMER_TAG_BARCODE_MAPPING=<json dict>`](#CONSUMER_TAG_BARCODE_MAPPING) {#CONSUMER_TAG_BARCODE_MAPPING}
+#### [`PAPERLESS_CONSUMER_TAG_BARCODE_MAPPING=<json dict>`](#PAPERLESS_CONSUMER_TAG_BARCODE_MAPPING) {#PAPERLESS_CONSUMER_TAG_BARCODE_MAPPING}
 
 : Defines a dictionary of filter regex and substitute expressions.
 
-    A barcode is only considered for tagging if at least one regex is matching
-    the barcode text. Before looking up or creating a tag, the substitute
-    is applied.
-
-    This allows very versatile matching as well as reformatting and mapping of
-    barcode pattern to tag values.
-
     Syntax: {"<regex>": "<substitute>" [,...]]}
 
-    Defaults to {"TAG:(.*)": "\\g<1>"} which includes any barcode beginning with
-    TAG: followed by any number of characters. It is substitured by its name
-    without the TAG: text.
+    A barcode is considered for tagging if the barcode text matches
+    at least one of the provided <regex> pattern.
+
+    If a match is found, the <substitute> rule is applied. This allows very
+    versatile reformatting and mapping of barcode pattern to tag values.
+
+    If a tag is not found it will be created.
+
+    Defaults to:
+
+    {"TAG:(.*)": "\\g<1>"} which defines
+    - a regex TAG:(.*) which includes barcodes beginning with TAG:
+      followed by any text that gets stored into match group #1 and
+    - a substitute \\g<1> that replaces the original barcode text
+      by the content in match group #1.
+    Consequently, the tag is the barcode text without its TAG: prefix.
+
+    More examples:
+
+    {"ASN12.*": "JOHN", "ASN13.*": "SMITH"} for example maps
+    - ASN12nnnn barcodes to the tag JOHN and
+    - ASN13nnnn barcodes to the tag SMITH.
+
+    {"T-J": "JOHN", "T-S": "SMITH", "T-D": "DOE"} directly maps
+    - T-J barcodes to the tag JOHN,
+    - T-S barcodes to the tag SMITH and
+    - T-D barcodes to the tag DOE.
+
+    Please refer to the Python regex documentation for more information.
 
 ## Audit Trail