How does Everything tells what is text file in context search?

[vsub]

Lets say I want to search for a specific text in files that I know they are text files but the extension is something random...ws\yml and so on
I want to find a text in a folder with many text files with not common extensions.

When I try to search ws files,everything displays nothing.

[therube]

Interesting question.
Wonder if you can't set or change the list of file extensions searched?
(Appears not? Seems what it searches through is based on iFilters [which I'm not getting a good grasp of]?)

I can tell you it does not like .doc.

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"C:\TMP\content search\" content:"this is a te"

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COPYING
lzop.txt
lzop.xyz

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C:\TMP\content search>file_gnuwin32.exe -m C:\BIN\UNIX\magic *   
COPYING;     ASCII English text
COPYING.doc; ASCII English text
lzop.txt;    ASCII English text
lzop.xyz;    ASCII English text

(The C* files & l* files are identical [sets].)

[void]

If you know the format of the content, you might like to try utf8content: for UTF-8 content, unicodecontent: for UCS2, ansicontent: for ANSI.

If you don't know the content format, you might like to try:
utf8content:"text to search"|unicodecontent:"text to search"|ansicontent:"text to search"

If the content is just ASCII text, then utf8content: will offer the best performance.

[therube]

So what, content: works off of IFilters, where all the other (unicode|utf8|ansi)content: ignore that & will search all files?

[void]

Correct.