For example, in the tag
<a href="glossary.html">, the
href attribute is set to “glossary.html”.
Most attributes are optional, but a few are required.
<for the less‐than symbol ‘<’), or that is not part of a document’s character set (ex.
©for the copyright symbol ‘©’). Character entities begin with ‘
&’ and end with ‘
video/quicktime. Type designations that are not officially registered have an
<em>) and end with an end tag (ex.
</em>). However, HTML allows some tags to be omitted (ex.
</’ and end with ‘
kilobyteis used to mean either 1,000 bytes or 1,024 bytes, in 1999 the International Electrotechnical Commission defined a
kibi‐prefix unambiguously signifying 1,024. Rarely used except by pedantic nerds, like me.
megabyteis used to mean 1,048,576 bytes, or 1,000,000 bytes, or even 1,024,000 bytes, in 1999 the International Electrotechnical Commission defined a
mebi‐prefix unambiguously signifying 1,048,576. Rarely used except by pedantic nerds, like me.
<em>). Start tags contain the name of the element and may also include attributes.
<’ and end with ‘
(), a distinct symbol designated to replace characters a Web browser cannot render. Web browsers that cannot render this symbol sometimes use other characters like ‘?’ to serve the purpose.