Can you explain the significance of the symbols slash, backslash, and question mark in mod_rewrite syntax?

The symbols slash (/), backslash (\), and question mark (?) have specific meanings in mod_rewrite syntax. The slash (/) is used to separate different parts of a URL, the backslash (\) is used to escape special characters, and the question mark (?) is used to indicate the start of query parameters in a URL. Understanding the significance of these symbols is crucial for correctly configuring rewrite rules in Apache's mod_rewrite module.

```php
RewriteEngine On
RewriteRule ^blog/([0-9]+)/?$ index.php?id=$1 [NC,L]
```
In this example, the slash (/) is used to separate the word "blog" from the numeric ID, the question mark (?) indicates the start of query parameters, and the backslash (\) is not used as it is not needed in this specific rule.