What is this "XML" I keep hearing about?

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extensible markup language.

It's kinda like 'Make your own HTML'. so you can send information to other people in standard format.

Like you can define XML like this

<Contact List>
<Person>
<Name>Azih</Name>
<Phone>555-5555</Phone>
<Phone>555-5554</Phone>
<Email>fake@fake.com</Email>
</Person>
</Contact List>

and then if a buncha different devices use the same XML you can send your contact list all over the place (cell phone, address book software, whatevea.)

I'm glossing over a whole ton of details but that's a high end overview of it.
 
XML has a lot more uses then online information. We use it for all our INI files import and exported data. It's really more of a human readable compound storage.
 
And it makes data sharing easy. As someone noted, if there's a standard XML format for certain data (say, RSS feeds) it makes it easy to write software that can exchange that data (like how Firefox can read RSS data to update bookmarks).
 
If it takes off the internet would be easier to get information from.

building catalogues from lotsa stores would be piss easy. just write a very simple query like
Get <description>PSP</description> <price>?</price> and the query would search the net for those containers and bring back an answer from all available places.

There are bunches of schemas to define data for a whole bunch of things. XBRL, MathML, etc


XML defines data, not display. so it's not like HTML which defines how things are displayed although XHTML is an XML display schema.
 
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