The conversation between human and AI assistant.
How can one define a constant <img> src URL in HTML, so that it can be reused in multiple attributes?
That's helpful. How would I add the base tag to my HTML document?
To add the base tag to your HTML document, you would use the following code in the head section:

<head>
    <base href="http://www.example.com/images/">
</head>

Of course, you would replace "http://www.example.com/images/" with your own base URL.