Custom biblatex style for citing images and tables

Question

I need to cite tables and images with a very specific style to satisfy a requirement from the institution. The resulting output of the \printbibliography should look like this for those citations:

Figure 3. http://www.example.com/img/name.jpg, visited on 6.3.2014

...

Table 6. http://www.example.com/tables/tables.pdf, visited on 9.3.2014.

Manually, this would be something like:

\newcommand{\tablebib}[3]{%
    Table \ref{#1} \url{#2}, visited on \displaydate{date}%
}

I'm using biblatex for other citations and would like to use it for those references as well. How can biblatex output such a format?

The final bibliography result should a mix between a more-or-less standard authoryear style (I managed to do this), and the above style for citing image and table sources from the Internet (I don't know how to do this):

Tomplinson, D., Baeyer, C.L., Stinson, J.N., Sung, L. (2010): A Systematic Review of Faces Scales for the Self-report of Pain Intensity in Children, Pediatrics, Vol.126, 5

...

Figure 3. http://www.example.com/img/name.jpg, visited on 6.3.2014.

Another manual try would be:

% arara: xelatex
% arara: biber
% arara: xelatex
\documentclass{scrartcl}
\usepackage[backend=biber,style=authoryear,sorting=nty]{biblatex}
\addbibresource{mwe.bib}

\begin{document}
\begin{table}[htb]
\begin{tabular}{l}
test
\end{tabular}
\caption{Description\cite{tab:test}}
\end{table}

\printbibliography
\end{document}

with the bibliography:

@Online{tab:test,
  Url                      = {http://www.example.com/images/image.jpg},
  Urldate                  = {2014-02-25},
  Timestamp                = {2014.06.13},
  Note                     = {Table \ref{tab:test}}
}

This outputs:

(2014) Table ??. URL: http://www.example.com/images/image.jpg (visited on 02/25/2014)

Year should not be visible. The reference should be resolved. URL: should not be displayed, but the url itself should be visible.

Answer 1

Your \ref should point to the label of the table caption, not to the bibitem itself. This should resolve the reference:

  \documentclass{scrartcl}
\usepackage[colorlinks, urlcolor=black, linkcolor=black]{hyperref} %if you want the link to be clickable

\usepackage{filecontents} 
\begin{filecontents} {mwe.bib}
@online{tab:test,
  author                   = {Doe, John},
  Url                      = {http://www.example.com/images/image.jpg},
  Urldate                  = {2014-02-25},
  Timestamp                = {2014.06.13},
  Note                     = {Table \ref{tab1}}, %<== this should point to your table caption label
  year                     = {2014}, %this is necessary for the in-text citation to work
}
\end{filecontents}

\usepackage[backend=biber, backref=true, style=authoryear, sorting=nty]{biblatex}
\addbibresource{mwe.bib}

\DeclareBibliographyDriver{online}{%this defines what will be printed in the bibliography for entries of type 'online'
  \usebibmacro{note+pages}
  \setunit{\addperiod\addspace}%Period+space after 'Note' field
  \usebibmacro{url+urldate}
  \usebibmacro{finentry}}


\begin{document}
\begin{table}
\caption{Figure legend here (\citeyear{tab:test})}{\label{tab1}} %<== this is what your \ref should be pointing to
\end{table}
Example \citeyear{tab:test} %This lets you cite only the year even if there is an author listed in your bib file, as opposed to \cite

\printbibliography
\end{document}

EDIT:

Adding this will remove URL:

\DeclareFieldFormat{url}{%
    {\url{#1}}}