Will it be more easy for me to learn XML,after I learn HTML. Someone said The job market is a lot better in XML. Is that true? I also want to learn xml to add to my resume,just putting html is lonely

XML and HTML are very different and one won't really help you with the other. XML is becoming much more popular as it's a key component in AJAX-type applications but it should be complimented with a server-side language.

I recently started reading 'Sam's teach yourself XML in 10 minutes', just to sort of get a feel for it. Ive read some of the other 10 mintues series and found them to be really useful...

But even after reading the first 5 or so chapters of the XML one, I STILL had no real idea on what XML is all about, or used for!?!??

It went straight over my head and was FULL of jargon. I'm not saying its the book's fault, I just think I'll get to grips with some other technologies that Im not familiar with, e.g. Javascript; and leave XML for a while!

I would suggest you learn HTML first, then XML.

You don't need to know XML to build a static web page.

HTML formats data, XML describes data. I think that XML really deals with databases. If you want to start dealing with web based databases, you will probably need to know some HTML first.

I think that XML really deals with databases

Not necessarily. Xml represent datas, as you said.
But you can associate it with an XSL stylesheet, that will allow to parse the XML via XPATH query, and transform it in something else.
try to look at this link source, its xml + xsl:
[ http://www.w3schools.com/xsl/cdcatalog_with_xsl.xml ]

It can be XHTML, HTML, RTF, PDF....
[ http://www.w3schools.com/xsl/ ]
[ http://xmlgraphics.apache.org/fop/ ]

At my work, we are using aan Oracle DB, that outputs XML to the browsers, and is associated with xsl stylesheet to create html.
It works well, on recent browser, don't need an server-side language, but has it's restrictions.
The biggest being that Safari have no xslt engine, which means it cannot format xml with xsl...

There's xml+xslt=??? like Tripy says ... you can transform to a different type of xml, or to html for display. Web services pretty much all run on xml. A lot of configuration files are stored in xml nowadays.

It's really an awful lot like html in a lot of ways. If you know the basics of one, you know the basics of both ... html is maybe a little more complex in the sense that you need to memorize pre-built meanings for each tag. In xml, <table> could refer to something you eat breakfast on. The more advanced uses take longer to master, obviously, but the basics come easily enough.

XML is for controlling database output, which is why AJAX applications use it. You will find that corporations mainly use AJAX applications because it's easier to have a computer program for say their customer service end edit the information that is stored in the database, and then XML will control that end of it, input/output methods.

XML is a data format, like HTML it is a markup language, unlike HTML it can be used to markup anything.

If you want to go into data processing learn XML, if you want to go into web development learn XML, if you want something to put on your CV, learn XML. It takes about 5 minutes to get the basics down.

Jamie