ref, label, newlabel: Usage

<..cross ref..>
 \def\:tempc#1{\a:pageref\o:pageref:{#1}\b:pageref}
 \HLet\pageref\:tempc
 \NewConfigure{pageref}[3]{%
    \def\a:pageref{#1\bgroup \Configure{ref}{\Link}{\EndLink}{#3}}%
    \def\b:pageref{\egroup #2}%
 }
 \Configure{pageref}{}{}{}
 -_-_-

<..cross ref..>+
 \NewConfigure{@newlabel}[1]{\concat:config\a:@newlabel{#1}}
 \let\a:@newlabel=\relax
 <.configure @newlabel.>
 \NewConfigure{newlabel}[2]{%
    \def\a:newlabel{#1}\ifx  \a:newlabel\empty
       \def\label:addr{\cur:th \:currentlabel}%
    \else
       \def\label:addr{#1}%
    \fi
    \def\a:newlabel##1{\expandafter\string\c:rEfLiNK{\label:addr}{#2}}}
 \NewConfigure{ref}[3]{%
    \def\a:rEfLiNK{#1}\def\b:rEfLiNK{#3}%
    \ifx \a:rEfLiNK\empty
       \ifx \b:rEfLiNK\empty
          \expandafter\def\c:rEfLiNK##1##2{##2}%
       \else
          \expandafter\def\c:rEfLiNK##1##2{#3}%
       \fi
    \else
       \ifx \b:rEfLiNK\empty
          \expandafter\def\c:rEfLiNK##1##2{#1{##1}{}##2#2}%
       \else
          \expandafter\def\c:rEfLiNK##1##2{#1{##1}{}#3#2}%
       \fi
    \fi
    \def\b:rEfLiNK{#2}%
 }
 \Configure{newlabel}{\cur:th \:currentlabel}{#1}
 \NewConfigure{newlabel-ref}[1]{\def\c:rEfLiNK{#1}%
    \ifx \at:startdoc\:UnDef \dflt:ref{#1}\else
       \pend:def\at:startdoc{\dflt:ref{#1}}\fi
 }
 \def\dflt:ref#1{\if@filesw\immediate\write\@auxout{\string\ifx
     \string#1\string\UnDef\gdef\string#1\#1\#2{\#2}\string\fi}\fi}
 \Configure{newlabel-ref}{\rEfLiNK}
 \let\:writefile=\@writefile
 \def\@writefile#1{\bgroup \catcode‘\:=11 \:wrtfile{#1}}
 \def\:wrtfile#1#2{\egroup\:writefile{#1}{#2}}
 -_-_-

• ‘\Configure{ref}{\Link}{\EndLink}{anchor}’ tells what \Link-type command should be on insertions of \ref. If the third parameter is empty, the anchor is the one provided by the system. If the first parameter is empty, no Link is assumed.

• \Configure{newlabel}{\cur:th \:currentlabel}{#1} supplies the target address and the anchor.
• \Configure{newlabel}{}{#1} is equivalent to \Configure{newlabel}{\cur:th \:currentlabel}{#1}
• The \Configure{newlabel-ref}{\rEfLiNK} command provides an intermediate link command for the aux command, which ‘\Configure{ref}{\Link}{\EndLink}{anchor}’ configures. If the first field of the last configuration command is empty, than the anchor is provided without its surrounding.