I was just looking at the "Filter" action, and the description of the available filters. There's no explanation for any of them, that I can find.
(By the way, even without an explanation, you should really take a look at the available filters, because there's some amazing things there.)
Here's the list, and I'm hoping you guys can add explanations, which maybe I can colate into something for the wiki. I've bolded the ones that aren't obvious:
Remove Styles (clipboards only, make the clipboard plain text).
Set line endings to Mac (CR), Unix (LF) or Windows/DOS (CRLF).
Trim Whitespace. (Remove leading and trailing whitespace from a string.)
Hard wrap or unwrap paragraphs.
Lowercase (all characters), Lowercase First (just the first character).
Uppercase (all characters), Uppercase First (just the first character).
Capitalize (all words) or Title Case (intelligently uppercase certain first letters).
Sentence Case (first character of each sentence) (v11.0+).
Change quotes to Smart, Dumb or French quotation marks.
Encode HTML or non-ASCII HTML entities.
Encode HTML with numeric entities.
Decode HTML entities.
Generate an HTML list.
Percent Encode or Decode a URL. Percent Encode will encode all non-alphanumeric characters.
Encode for Regular Expression.
Encode or decode Base64.
Calculate MD5.
Styled Text to/from RTF plain text (v11.0+).
Quote for AppleScript, JavaScript, Shell (bash) Script, Swift, JSON or Process Tokens.
Convert a JSON object string to Compact or Pretty format.
Get parent of a path.
Get the filename component of a path.
Get the base name of the path (ie the filename without directory or extension).
Get or delete the path extension.
Get the display name of a path.
Expand tilde (~) paths, or abbreviate with a tilde.
Resolve symlinks, or standardize the path.
Get the URL scheme, host, port, user, password, path, fragment or query.
Sort, reverse (first⇔last), or shuffle (perpetuate) lines.
Delete or bullet (•) control characters.
Calculate an expression and return the result, see the Calculations section.
Process Text Tokens and return the result, see the Tokens section.
Get the value of a named Variable or Named Clipboard.
Count the characters, words or lines and return the result.
It's not obvious, but "", "a", and "a\n" all return a line count of one. (I would have preferred that they return values of 0, 1 and 2.) It's not mentioned in the wiki, but there's a link in the wiki to a forum page that discusses this issue.
"Hard wrap" splits text at word boundaries to keep line length below 78(?) characters but as long as possible. The Filter does this by replacing the latest possible "horizontal space" character, for example a %Space% or a %Tab%, with a return character (%Return% or \r). Good for creating "fixed width" text blocks from "normal" text.
"Unwrap" replaces any %Return% or %LineFeed% it considers to be "mid-paragraph" with a %Space% character. ("Mid-paragraph" appears to be when the return/line-feed character is not followed by a %Space%). Good for creating "normal" text from fixed-width blocks.
Both variants seem to work equally as well on rich text as on plain.
Can be considered to be the same as "the name of an item as displayed in the Finder when 'Hide Extension' is turned on in the item's 'Get Info...' window".
Essentially, the text in a path between the final / (or between the penultimate and final /s if there's a trailing /) and the final .
Path
Display Name
Users/me/Desktop/testFile.txt
testFile
Users/me/Desktop/testFile.txt.zip
testFile.txt
Users/me/Desktop/testFolder
testFolder
Users/me/Desktop/testFolder/
testFolder
Users/me/Desktop/test.Folder/
test
Watch out for that last one if you are in the habit of using .s in folder names!
Maybe I'm missing the obvious, but what would you use this for, in KM? I mean, I understand what HTML lists are, but this seems like an obscure thing for KM to offer.
Not sure what the specific context or history is there.
(I personally have something similar for generating the nested <ul><li> of Bike Outliner HTML from tab-indented lists, but that's fractionally more specialised)
I've been wrong a few times before, so I could be wrong again, but on this page, the word "perpetuate" probably is a type for "permute". Even with that fix, the word "permute" is very vague. Permute the letters in each line? Permute each line in the file?