regex101: 1

<span style=the literal text <span style= (case sensitive)

Non-Capturing Group(?:\\){0,2}

{0,2}repeats the group contents below between 0 and 2 times:

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

"--en-type:the literal text "--en-type: (case sensitive)

Non-Capturing Group(?:\s)??

??repeats the group contents below at most once:

\sany whitespace character

tag;--en-tagId:the literal text tag;--en-tagId: (case sensitive)

Non-Capturing Group(?:\s)?

?repeats the group contents below at most once:

\sany whitespace character

Group 1([^\/\\;]+)

Negated Character Class[^\/\\;]+

+matches at least one character outside the set below:

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

Non-Capturing Group(?:;)?

?repeats the group contents below at most once:

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

Non-Capturing Group(?:\\){0,2}

{0,2}repeats the group contents below between 0 and 2 times:

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

">the literal text ">

Group 2([^<>]+)

Negated Character Class[^<>]+

+matches at least one character outside the set below:

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

span>the literal text span> (case sensitive)

Search reference

Regular Expression

<span style=(?:\\){0,2}"--en-type:(?:\s)??tag;--en-tagId:(?:\s)?([^\/\\;]+)(?:;)?(?:\\){0,2}">([^<>]+)<\/span>

New

<!DOCTYPE en-note SYSTEM "http://xml.evernote.com/pub/enml2.dtd"><en-note><p><span style="--en-type:tag;--en-tagId:17436cb0-7873-4317-8453-623e7f3a5dd1;">#234234<>&</span>  <span style="--en-type:tag;--en-tagId:ed628b06-297b-4411-9266-3e5fa64f4f5c;">#21423<>14n</span> <span style="--en-type:tag;--en-tagId:27f5d787-9e2a-4d66-9c6e-1f938aa60834;">#2423432</span> </p></en-note>