19:20 Dec 9, 2011 

Thank you very much. But I just saw i didnt post my doubt properly
the parragraph was:

"In this step some of the divergent spellings are classified as mere colloquialisms and not actual Yorkshire dialect. The next step consists of a careful classification of the irregular graphemes. Received Pronunciation is the standard for the classification of the words, the vowel sounds acting as the principal focus. "

It means that the RP is the basis for the clasiffication of the different pronunciations in Yks dialect, and that the main point will be on the vowels and not the consonants, for example.

Thus I am not sure the answers you all give me are the most accurate ones...

Sorry not to have attached the whole paragraph the first time!

19:06 Dec 4, 2011 

Your proposed omission would change the meaning:
"Received Pronunciation is the standard ..." (i.e. against which other things are measured) vs
"Received Pronunciation is standard ... " (i.e. what is usually employed).

17:59 Dec 4, 2011 

The extract does look awkward. The author could also do without "the" before "standard", as "is" is a linking verb here.

13:39 Dec 4, 2011 

... that you should get a native speaker of English to carry out this revision. Note that "academical paper" should be "academic paper". Regarding your specific question, you omit the definite article before "words"in your posted term, but it is there in the quotation. Its inclusion changes the meaning from general to specific. What sort of classification is being referred to? Is this about phonetics?