I have an asp.net (vb) with 47 pages. The problem is that it's in 10 different languages, although 98% just use English. I have 5 master pages. I've read Google Webmaster Tools, but I'm still confounded.

I'm reading about how microdata is the way to go. Does this mean I should put itemtype and itemprop span and div tags in my master pages, or should I do all of my 47 pages (.resx resource files) separately? The main key phrase I want throughout search results is "machine vision".

For instance, the first couple sentences on my "about.aspx" page are:

<span itemprop="name">USS Vision Inc.</span> (USS) is a privately-owned company 
with headquarters in <span itemprop="locality">Detroit, Michigan, USA</span>. We 
design, engineer, produce, and integrate special machine vision 
error-proofing products and <a href="http://www.ussvision.com/services/" 
target="_self" itemprop="url">services</a> that create lean factories by improving 
the quality of manufactured products, and by significantly reducing manufacturing 
costs through advanced automation.

Am I doing this right, or how would I do this if I'm not? Should I use the itemprop="url" or other rich snippets for every link in my website? I mean, do I need to add an itemprop to just about everything, or can I just alter my master pages? Any guidance in this regard to help improve my SEO and SERPS would be greatly appreciated!