具有任意属性值的XML元素的正则表达式

Question

I'm not very confortable with RegEx.

I have a text file with a lot of data and different formats. I want to keep this kind of string.

<data name=\"myProptertyValue\" xml:space=\"preserve\">

Only the value of the name property can change.

So I imagined a regex like this <data name=\\\\\\"(.)\\\\\\" xml:space=\\\\\\"preserve\\\\\\"> but it's not working.

Any tips?

Answer 1

try this

<data name=\\".*?\\" xml:space=\\"preserve\\">

no need to add \\ to "

Answer 2

Your (.) will capture only a single character; add a quantifier like + (“one or more”):

/<data name=\\"(.+)\\" xml:space=\\"preserve\\">/

Depending on what exactly your input is (element by element or entire document) and on what you want to achieve (removing/replacing/testing/capturing), you should make the regex global (by adding the g flag), so it is applied not only once. Also, you should make the + quantifier lazy by adding a ? to it. That will make it non-greedy, because you want capturing to stop at the ending quote of the attribute (like all but quotation mark: [^"] ). Then, it will look like this:

/<data name=\\"(.+?)\\" xml:space=\\"preserve\\">/g

Answer 3

<data name=\\"(.+)\\" xml:space=\\"preserve\\">

It will catch what's inside "data name".

If you're having trouble with regex, using this kind of sites to construct your regex can help you : https://regex101.com/ , http://regexr.com/ etc.