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The "<lvm command> -S/--select help" shows help (including list of fields to match against):
...field list here including the field type name...
Selection operands
------------------
field - Reporting field.
number - Non-negative integer value.
size - Floating point value with units specified.
string - Characters quoted by ' or " or unquoted.
string list - Strings enclosed by [ ] and elements delimited by either
"all items must match" or "at least one item must match" operator.
regular expression - Characters quoted by ' or " or unquoted.
Selection operators
-------------------
Comparison operators:
=~ - Matching regular expression.
!~ - Not matching regular expression.
= - Equal to.
!= - Not equal to.
>= - Greater than or equal to.
> - Greater than
<= - Less than or equal to.
< - Less than.
Logical and grouping operators:
&& - All fields must match
, - All fields must match
|| - At least one field must match
# - At least one field must match
! - Logical negation
( - Left parenthesis
) - Right parenthesis
[ - List start
] - List end