CC License: Attribute xmlns:dct not allowed here

I'm working on a simple real estate website The W3C validator gives me the following error, on a cut and paste Creative Commons license:

 Error Line 121, Column 279: *Attribute xmlns:dct not allowed here.*

…rl.org/dc/terms/" property="dct:title">Bangalore Property Buy</span> by <a xml…

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Warning Line 121, Column 279: *Attribute with the local name xmlns:dct is not serializable as XML 1.0.*

…rl.org/dc/terms/" property="dct:title">Bangalore Property Buy</span> by <a xml…

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Error Line 121, Column 457: *Attribute xmlns:cc not allowed here.*

…tributionName" rel="cc:attributionURL">IndiranagarSeller@-ignore-this-gmail.co…

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Warning Line 121, Column 457: *Attribute with the local name xmlns:cc is not serializable as XML 1.0.*

…tributionName" rel="cc:attributionURL">IndiranagarSeller@-ignore-this-gmail.co…

How do i fix this and what do the errors mean?