Polynomial ring with division in some variables

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While reading a textbook I have encountered a Polynomial Ring with notation R(x1,x2...xm)[y1,y2...yn]. This is a ring that includes all polynomial with xs and ys in the numerator and xs in the denominator. Is there a canonical name for such a ring? I would like to work over this ring in a Sagemath script, is there a way to implement this (e.g take the union of a Polynomial Ring and a Laurent Ring)?

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I don't know if this is what the notation represents, but I was finally able to implement this as a Polynomial Ring in variables y1..yn over the Fraction Field of variables x1..xm