How are diacritical marks, spaces and slash marks encoded in a request?

In an SRU request, these have to be converted into URL code (UTF-8 hexadecimal, also known as percent encoding). Examples: the letter ä is converted to %C3%A4, a space to %20 and a slash to %2F. Search terms can be enclosed in quotation marks (“search term”). If a search term contains the signs < > = / ( ) or spaces, these must be enclosed by quotation marks (for example the library code "1w/r" in URL code: "1w%2Fr") (see Standard).