From 81bae32aa36366f28d949ac8fa7aaa8cdb853807 Mon Sep 17 00:00:00 2001
From: "Izzard, Robert Dr (Physics)" <r.izzard@surrey.ac.uk>
Date: Tue, 7 Dec 2021 12:31:10 +0000
Subject: [PATCH] Update README.md

---
 README.md | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/README.md b/README.md
index ef6fb8d..1564d8a 100644
--- a/README.md
+++ b/README.md
@@ -11,14 +11,14 @@ A Python script to load and filter a JSON file, showing the nested-key structure
 
 The first argument should be the JSON filename.
 
-Following arguments are optional, and are one or more of:
+The following filter arguments are optional and are one or more of:
 
-+regex : any key in the path must match the regex (like "grep")
--regex : no key in the path can match the regex (like "grep -v")
-$regex : the final key in the path must match the regex (note: you may have to
-          escape the $ in your terminal)
-^regex : the first key in the path must match the regex
+- `+regex` : any key in the path must match the regex (like "grep")
+- `-regex` : no key in the path can match the regex (like "grep -v")
+- `$regex` : the final key in the path must match the regex (note: you may have to escape the $ in your terminal)
+- `^regex` : the first key in the path must match the regex
 
+`regex` means Regular Expression. While you can use simple strings, these will be interpreted as regular expressions. If you are not familiar with these, you might want to start at https://en.wikipedia.org/wiki/Regular_expression .
 
 
 Requires various standard Python modules that, if not available, are easily
-- 
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