REX Extract and/or separate a single field into 1 or 2 fields based on different patterns

[sh254087]

Need to extract or split a filed value into different fields based on a condition/irregular pattern(or however it can be called).

Attached is what I tried but it did not work.

Expected output:
MeterName field should be separted into one or two fields based on the field value and pattern. / works as a separator wherever exixts. The text "Low Priority" if exists, should be ignored.

Possible source field value patterns and Expected extraction output :
Pattern 1 : "single alphanumeric word" = Should be MeterName1
Pattern 2: "multiple alphanumeric words separated by space" = MeterName1
Pattern 3 : "single alphanumeric word" -space- Low priority = MeterName1 (while "* -space- Low priority*" ignored)
Pattern 4: "multiple alphanumeric words separated by space" -space- Low priority = MeterName1 (while "-space- Low priority" ignored)
Pattern 5 : "single alphanumeric word or multiple words separated by space" / "single alphanumeric word or multiple words separated by space" = MeterName1 / MeterName2
Pattern 6 : "single alphanumeric word or multiple words separated by space" / "single alphanumeric word or multiple words separated by space" -space- Low priority = MeterName1 / MeterName2 (while "-space- Low priority" ignored)

Tried few other but again not the required output:
| rex field=MeterName "^(?\w+\s\w+)\/(?\w+).*$"
= > Matched only one entry, with result - MeterName = E20 v3/E20s v3 Low Priority MeterName1 =E20 v3 MeterName2 = E20s

| rex field=MeterName "^(?\w+\s\w+)\/(?\w+.*)$"
= > Matched only one entry, with result - MeterName = E20 v3/E20s v3 Low Priority MeterName1 =E20 v3 MeterName2 = E20s v3 Low Priority

Can someone please help me achieve the expected result?

[woodcock]

Nobody is going to be able to help you when you post pictures. We need text so that we can work with it in our Splunk Search Heads.

[sh254087]

While trying around, I finally found a way of putting rex commands in multiple different formats that together served my requirement. However, I feel it may not be the right way of writing it. Hence please help me fine tune and reduce/optimize the code.

Here's the code and the output:

[woodcock]

If you are doing RegEx on the same source filed, then you can do this:

... | rex field=foo "(?:RegEx1)|(?:RegEx2)|(?:RegEx3)|(?:RegEx4)|(?:RegEx5)|(?:RegEx6)"