#data
<isindex>
#errors
#document
| <html>
| <head>
| <body>
| <form>
| <hr>
| <label>
| "This is a searchable index. Enter search keywords: "
| <input>
| name="isindex"
| <hr>
#data
<isindex name="A" action="B" prompt="C" foo="D">
#errors
#document
| <html>
| <head>
| <body>
| <form>
| action="B"
| <hr>
| <label>
| "C"
| <input>
| foo="D"
| name="isindex"
| <hr>
#data
<form><isindex>
#errors
#document
| <html>
| <head>
| <body>
| <form>