About Link schemes. What Is Link Schemes? I'd say, it's such a bad backlink that a publisher intentionally points it to his website in purpose to higher the existance of the website. It's somehow the same with a poetry that says "To be an apple in Google's eyes". Yes it's something like that. - A few times ago, this was realy an effective way to get a higher PageRank of Google, but no more today. As you too knew, Google has launched two algorithms that now we call Google Panda and Google Penguin to overcome this matter, that which they're updated/refreshed regularly. many websites have been punished by those two algorithms. Some got their PageRanks fallen down, and some even worse their websites had been penaltied, perhaps. So be wise in generating backlinks for your website.
There are some criteria of links that are considered as Link Schemes, they're as follows:
*Links intended to manipulate PageRank.
*Links to web spammers or bad neighborhoods on the web.
*Excessive reciprocal links or excessive link exchanging ("Link to me and I'll link to you.").
*Buying or selling links that pass PageRank.
Beside the above criteria, maybe you want also to be carefully to post a comment with links point to your website. Such as post a relevant comments, choose the right page to link to, and make the comment good in structure so poeple can read and understand what you say about.
That's all everybody. See ya soon..