Latex Counter custom reference formatting

Here's a small snippet that can do this:

newcounter{reqcount}
newcommand{reqitem}[1]{%
  Rref*{#1} refstepcounter{reqcount}label{#1}
}
newcommand{descref}[1]{%
  hyperref[#1]{Rref*{#1}}%
}

Example usage:

Here is req: reqitem{reqi:a}

Here is req: reqitem{reqi:b}

Here is reference: descref{reqi:a}, descref{reqi:a}, descref{reqi:b}

Result:

It is sufficient to redefine macro the<counter>. Then the label/ref system will pick it up automatically:

newcounter{requirementcounter}
renewcommand*{therequirementcounter}{Rarabic{requirementcounter}}

...
refstepcounter{requirementcounter}therequirementcounter
label{req:a}
...
ref{req:a}