How can use log to find specific words

[bab]

I have created an item that can search in specific file and if find something will show in the last value .So this is my key
log[/net/storage/dump/digital-orcl/dgtlbnk-2023021603.log,RESOURCE] now it is searching in the file and if could find RESOURCE will show it.
But is it possible to search and find many items such as error OR warning OR failed for example :

log[/net/storage/dump/digital-orcl/dgtlbnk-2023021603.log,error OR warning OR failed]

and ignore case sensitive

[Hamardaban]

The second parameter in the log key is "regexp - a regular expression describing the required template"
You can read more here and here.
There are many articles about regular expressions on the Internet. And the best - https://regex101.com

log[/net/storage/dump/digital-orcl/dgtlbnk-2023021603.log,"(?i)error|warning|failed"]​​

[bab]

The second parameter in the log key is "regexp - a regular expression describing the required template"
You can read more here and here.
There are many articles about regular expressions on the Internet. And the best - https://regex101.com

log[/net/storage/dump/digital-orcl/dgtlbnk-2023021603.log,"(?i)error|warning|failed"]​​

So thanks. Would you please say what does mean (?i) ?

[Hamardaban]

case insensitive
pls read about "regular expression" (the magic of google to help) and links that i provided.

[bab]

case insensitive
pls read about "regular expression" (the magic of google to help) and links that i provided.

So thanks. I was read it but I am looking for exclude words for example according to follow sample trigger will fire if it finds words such as oracle
but I want exclude oracle word from the list and find other words that include ora

log[/net/storage/dump/digital-orcl/dgtlbnk-2023021603.log,"(?i)error|warning|ora"]