Extended reference for enumerate item using parent environment

Here is my suggestion how to do it. I only used the very powerful zref-package which can store a lot more (label)informations than the standard label-command. Additionally there are new commands (\entityLabel and \entityRef) which are used in the entity environment. I don't want to explain all lines of the given code, because I think using the zref-package documentation in parallel and the commented lines makes it easy to understand the code.

\documentclass{scrartcl}
\usepackage{zref-user}
\usepackage[colorlinks]{hyperref}

\makeatletter
% new properties in zref
\zref@newprop{EntityName}{}
\zref@newprop{EntityTag}{}
\zref@newprop{EntityCounter}{}
\zref@newprop{ItemCounter}{}

% add the new properties to the main list
\zref@addprop{main}{EntityName}
\zref@addprop{main}{EntityTag}
\zref@addprop{main}{EntityCounter}
\zref@addprop{main}{ItemCounter}

% define some hyper references
\def\entityRef@EntityName#1{%
    \def\tag{\zref@extractdefault{\zprefix#1}{EntityTag}{}}%
    \def\name{\zref@extractdefault{\zprefix#1}{EntityName}{}}%
    \hyperref[\zprefix\tag]{\name}}

\def\entityRef@EntityCounter#1{%
    \def\tag{\zref@extractdefault{\zprefix#1}{EntityTag}{}}%
    \def\count{\zref@extractdefault{\zprefix#1}{EntityCounter}{0}}%
    \hyperref[\zprefix\tag]{\count}}

\def\entityRef@ItemCounter#1{%
    \def\icount{\zref@extractdefault{\zprefix#1}{ItemCounter}{0}}%
    \hyperref[\zprefix#1]{\icount}}

\def\entityRef@EntityPage#1{%
    \def\pagenum{\zref@extractdefault{\zprefix#1}{page}{0}}%
    \hyperpage{\pagenum}}

% counter for the entities
\newcounter{EntityCounter}

% prefix for all labels and references
\def\zprefix{entity:}

% boolean to check if we work inside an entity environment
\newif\ifIsInEntity

% the new entity environment
\newenvironment{entity}[1]{%
    \IsInEntitytrue
    \refstepcounter{EntityCounter}%
    \def\entityName{#1}
    \def\entityTag{Entity\theEntityCounter}
    \addcontentsline{toc}{section}{\theEntityCounter. Entity: #1}
    \noindent\textbf{\label{\zprefix\entityTag}\theEntityCounter. Entity: #1}%
    \begin{enumerate}
}{%
    \IsInEntityfalse
    \end{enumerate}
}%

% a new label
\def\entityLabel#1{%
    \zref@setcurrent{EntityName}{\entityName}%
    \zref@setcurrent{EntityTag}{\entityTag}%
    \zref@setcurrent{EntityCounter}{\the\value{EntityCounter}}%
    \zref@setcurrent{ItemCounter}{\theenumi}%
    \zlabel{\zprefix#1}\label{\zprefix#1}}

% a new ref
% the output depends on the place where the reference is used
\def\entityRef#1{%
    \ifIsInEntity
        % reference is inside an entity
        % compare the saved EntityCounter with the current EntityCounter
        \ifnum\zref@extractdefault{\zprefix#1}{EntityCounter}{-1}=\theEntityCounter
            % reference is inside the same entity
            see Item \entityRef@ItemCounter{#1}%
        \else
            % reference is in an other entity
            see \entityRef@EntityCounter{#1}.\entityRef@ItemCounter{#1}%
        \fi
    \else
        % reference is outside of an entity
        see Entity "\entityRef@EntityName{#1}" (Nr. \entityRef@EntityCounter{#1}) Item \entityRef@ItemCounter{#1} on page \entityRef@EntityPage{#1}%
    \fi
}


\makeatother

\begin{document}
\tableofcontents
\newpage
\begin{entity}{First Test}
    \item Some text with label \entityLabel{Entity1Item1}
    \item Some more text, oh and \entityLabel{Entity1Item2}
    \item More text \entityRef{Entity1Item1}
\end{entity}
\noindent
Refernce in text: \entityRef{Entity1Item1}\\
Refernce in text: \entityRef{Entity2Item2}\\
Refernce in text: \entityRef{Entity3Item2}\\

\begin{entity}{Second Test}
    \item Referencing \entityRef{Entity2Item2}
    \item Referencing \entityLabel{Entity2Item2}\entityRef{Entity1Item2}
    \item Referencing \entityRef{Entity1Item2}
\end{entity}
\newpage
\begin{entity}{Third Test}
    \item Referencing \entityRef{Entity1Item1}
    \item Referencing \entityLabel{Entity3Item2}\entityRef{Entity2Item2}
    \item Referencing \entityRef{Entity1Item2}
\end{entity}
\end{document}