XML Namespace Declaration

const re = new RegExp("xmlns(?::([\\w\\-]+))?\\s*=\\s*[\"']([^\"']+)[\"']", "g");
const input = "<svg xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">";
const matches = [...input.matchAll(re)];
console.log(matches.map(m => m[0]));

import re

pattern = re.compile(r"xmlns(?::([\\w\\-]+))?\\s*=\\s*[\"']([^\"']+)[\"']")
input_text = "<svg xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">"
for m in pattern.finditer(input_text):
    print(m.group(0))

package main

import (
	"fmt"
	"regexp"
)

func main() {
	re := regexp.MustCompile(`xmlns(?::([\w\-]+))?\s*=\s*["']([^"']+)["']`)
	input := `<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">`
	for _, match := range re.FindAllString(input, -1) {
		fmt.Println(match)
	}
}