Bibliography entry apart from author year style

Question

I'm trying to accomplish the following task:

In my thesis I have to refer to a lot of literature, which works well with the normal authoryear style. I got a template from my institute which I managed to make it work with biblatex and biber.

However, I have to cite some norms that should look like this:

DIN ISO 18351:2010-06: Title (in italic), version (draft, final...)

Can anybody help me with that? I've tried to add "DIN ISO 18351:2010-06" as the author or label, but then in the bibliography it adds something like date unknown... Do I have to define a custom entry type for that? Moreover, I would like to refer to it as (DIN ISO 18351, 2010) in the text. Is that difficult to implement or can I do it somehow with standard commands? The problem here is that I want to cite the title in the text instead of the author.

MWE

\documentclass{article}
\usepackage[
backend=biber,
style=alphabetic,
citestyle=authoryear,
sorting=ynt
]{biblatex}
\usepackage{filecontents}
\begin{filecontents*}{\jobname.bib} 
@misc{key, author = {DIN ISO 18351}, year = {2010-6}, title = {Title} }
\end{filecontents*}

\addbibresource{\jobname.bib} 

\begin{document}
\section{First section}

\cite{key}

\medskip

\printbibliography


\end{document}

Output:

Answer 1

You question isn't quite clear enough to answer, but this will get you most of the way and probably only need to be tweaked.

Explanation is in comments.

\documentclass{article}

\usepackage[
style=alphabetic,
citestyle=authoryear,
sorting=ynt
]{biblatex}

\usepackage{filecontents}
\begin{filecontents*}{\jobname.bib} 
@diniso{diniso18351,
  title = {Title},
  number = {18351},
  version = {1.0},
  pubstate = {final},
  date = {2010-06}}
\end{filecontents*}

\addbibresource{\jobname.bib} 

% add new diniso entry type
\DeclareDatamodelEntrytypes{
  diniso}

% set bibliography label template for diniso entry type
\DeclareLabelalphaTemplate[diniso]{%
  \labelelement{
    \field{number}
  }
}

% use comma before year in citations without authors
% this will apply to all entry types
\renewcommand*{\nonameyeardelim}{\addcomma\space}

% field formats for diniso entry type
\DeclareFieldFormat[diniso]{version}{#1}
\DeclareFieldFormat[diniso]{pubstate}{\mkbibparens{#1}}
\DeclareFieldFormat[diniso]{date}{%
  \thefield{year}%
  \bibdatesep
  \mkmonthzeros{\thefield{month}}}

% custom driver for diniso entry type
\DeclareBibliographyDriver{diniso}{%
  \usebibmacro{bibindex}%
  \usebibmacro{begentry}%
  \printtext{DIN ISO}%
  \setunit{\addspace}%
  \printfield{number}%
  \setunit{\addcolon}%
  \printdate
  \setunit{\addcolon\space}%
  \usebibmacro{title}%
  \setunit{\addcomma\space}%
  \printfield{version}%
  \setunit{\addspace}%
  \printfield{pubstate}%
  \usebibmacro{finentry}}

% custom citation label for diniso entry type
\newbibmacro*{cite:label}{%
  \iffieldundef{label}
    {\ifentrytype{diniso}
      {\printtext[bibhyperref]{%
         \printtext{DIN ISO}%
         \setunit{\addspace}%
         \printfield{number}}}
       {\printtext[bibhyperref]{\printfield[citetitle]{labeltitle}}}}
    {\printtext[bibhyperref]{\printfield{label}}}}

\pagestyle{empty}
\begin{document}
\section{First section}

\parencite{diniso18351}

\printbibliography

\end{document}