What is the purpose of "::#" in a string returned from a RequestMethod?

Question

In my project, in a method I see a following return statement :

@RequestMapping(method=RequestMethod.GET, params="part=category-fieldset")
public String partCategoryFieldset(@PathVariable String language, Model model) {
    CategoryTree categoryTree = categoryService.readCategoryTree(language);
    model.addAttribute("categoryTree", categoryTree);
    return "/article/create::#category-fieldset";
}

So, i would like to ask: What is the purpose of double colon and sharp sign in return statement? What does this mean? Thank you!

Answer 1

Yeah! I finded the answer for me. It's Thymeleaf Framwwork. at here