There are two major types of tags in HTML and XHTML. There are block level tags and inline level tags. Block levels tags are elements that contain other elements. These include paragraphs, headings, tables, etcetera and the special generic block element div. Inline level tags represent objects that typically occur in the line of text including I, B, image, etcetera and the special generic inline elements span. Let's take a look at some block and inline level elements in our editor here at the top of the screen. We see the center tag contains paragraphs and the paragraphs contain in this case an emphasize element and in this case an image element.
Paragraphs are special in this way and that the P tag is the only block level element that cannot contain other block level elements. Paragraphs can only contain text and inline level elements. Other block level elements can contain both block level and inline level elements as in the case of the center tag here. Also, take note that images are inline elements. This can be a point of confusion, so it's good to remember. Images are inline elements; they are not block level elements.
This is just an overview of block and inline level tags. As we go over individual tags in the rest of the course. We'll talk about whether they are block level or inline level, so you can get that straight at the time.
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