subsections

Index

Spec. Chars

Numbers

HTML Vocabulary URI Simple XLink Extended XLink RDF Metadata

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HTML for PDF Acronym

when PDF means Portable Document Format

New! Now updated with the inheritance rules for the title attribute in HTML 5

The easiest way to create HTML code indicating that the acronym PDF stands for Portable Document Format is to simply include the acronym in an HTML <a> tag and an abbreviation tag (not an acronym tag):

This is the recommended code for both HTML 4 browsers and HTML 5 browsers. Some browsers, most notably IE, do not activate help when the title attribute is coded on the <abbr> tag, but they do work as expected for titles on the <a> tag. The <abbr> tag inherits its title attribute from the parent <a> tag.

If you are creating HTML code for the definition of Portable Document Format, the meaning of the acronym PDF, then include a <dfn> definition tag around the <abbr> abbreviation tag and follow the entire HTML code for the hypertext link with the definition of the term:

A <a href="http://www.Acronyms.net/terms/p/Portable-Document-Format/" title="Portable Document Format" onclick="if (confirm('PDF stands for Portable Document Format')) return false;" > <dfn><abbr title="Portable Document Format">PDF</abbr> </a> is ...(definition of Portable Document Format)....

The <dfn> tag gets the term being defined from the title attribute of the <abbr> tag. The result should look like this (hovering your mouse over the PDF acronym shows the expanded meaning of the acronym):

A PDF is ...(definition of "Portable Document Format")....

If you are creating HTML code that simply expands the acronym then indicate that it is the PDF acronymn which is being defined using an HTML <dfn> tag with a title attribute around the <abbr> tag and follow the HTML for the hypertext link with the acronym definition:

When we use the acronym <a href="http://www.Acronyms.net/terms/p/Portable-Document-Format/" title="Portable Document Format" onclick="if (confirm('PDF stands for Portable Document Format')) return false;" > <dfn title="PDF"><abbr title="Portable Document Format">PDF</abbr></dfn> </a> it is the abbreviation for Portable Document Format.

The result should look like this (hovering your mouse over the PDF acronym shows the definition):

When we use the acronym PDF it is the abbreviation for Portable Document Format.

Acronym Vocabulary URI Declaration

For the remaining examples, the Acronym Vocabulary namespace URI needs to be declared for use with element tag names and attribute values. For an HTML web page, the beginning of the file should look like this:

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html [ <!ENTITY at "http://Acronyms.net/terms/"> <!ENTITY av "http://Acronyms.net/vocabulary/"> ]> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:av="&av;"> <head> <style type="text/css"> .hide { display: none } </style> ...

This only needs to be done once per document file.

XLink simple link

First, declare the vocabulary as shown above. Then, add acronyms as follows:

XLink extended link

First, declare the vocabulary as shown above. Then, add acronyms as follows:

<a xlink:type="extended" href="http://www.Acronyms.net/terms/p/Portable-Document-Format/" title="Portable Document Format"> <abbr xlink:type="resource" xlink:label="acronym">PDF</abbr> p d f Portable Document Format <span class="hide" xlink:type="locator" xlink:label="finder" xlink:role="&av;reference" xlink:href="http://www.Acronyms.net/reference/p/PDF#Portable-Document-Format" xlink:title="PDF - Portable Document Format"/> </a>

embedded RDF metadata

First, declare the vocabulary as shown above. Then, add acronyms as follows:

Printer-friendly PDF* format:

Portable Document Format

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