I am trying to specify the citation of a data base. Consider the following MWE with two entrances:`
\documentclass[12pt, bibliography=totocnumbered, listof=totoc]{scrartcl}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\usepackage[ngerman]{babel}
\usepackage{csquotes}
\usepackage{filecontents}
%Bibliotheken
\usepackage
[style=ext-authoryear,labelnumber, useprefix=true,
sorting=nyt,maxbibnames=9,maxcitenames=3,uniquelist=false, backend=biber,
doi=false,isbn=false,url=false,
uniquename=false,bibencoding=utf8, date=year, giveninits=true, terseinits=false, dashed=false]
{biblatex}
%Doppelpunkt nach Jahr
\renewcommand{\labelnamepunct}{\addcolon\space}
%Remove Dot after volume
\renewbibmacro*{volume+number+eid}{%
\printfield{volume}%
% \setunit*{\adddot}% DELETED
% \setunit*{\addnbspace}% NEW (optional); there's also \addnbthinspace
\printfield{number}%
\setunit{\addcomma\space}%
\printfield{eid}}
\DeclareFieldFormat[article]{number}{\mkbibparens{#1}}
% Number of articles in parentheses
\DeclareFieldFormat[article]{number}{\mkbibparens{#1}}
%Dot after journal title
\DeclareFieldFormat{journaltitle}{{#1}\isdot}
\renewbibmacro*{journal+issuetitle}{%
\usebibmacro{journal}%
\setunit*{\addcomma\space}%
\iffieldundef{series}
{}
{\newunit
\printfield{series}%
\setunit{\addspace}}%
\usebibmacro{volume+number+eid}%
\setunit{\addspace}%
\usebibmacro{issue+date}%
\setunit{\addcolon\space}%
\usebibmacro{issue}%
\newunit}
%Dort und Sorting Last-First
\DeclareNameAlias{sortname}{first-last-bold}
\DeclareNameFormat{first-last-bold}{\mkbibbold{%
\ifgiveninits
{\usebibmacro{name:last-first}{\namepartfamily}{\namepartgiveni}{\namepartprefix}{\namepartsuffix}}
{\usebibmacro{name:last-first}{\namepartfamily}{\namepartgiven}{\namepartprefix}{\namepartsuffix}}%
\usebibmacro{name:andothers}}}
%Change to Zugriff am
\DefineBibliographyStrings{german}{%
urlseen = {Zugriff am},
}
%URL date without parantheses
\DeclareFieldFormat{urldate}{\addcomma\space\bibstring{urlseen}\space#1}
%Remove word "URL":
\DeclareFieldFormat{url}{\url{#1}}
\begin{filecontents}{\jobname2.bib}
@Article{Hansen2011,
author = {Hansen, Peter R. and Lunde, Asger and Nason, James M.},
title = {The Model Confidence Set},
journal = {Econometrica},
year = {2011},
volume = {79},
number = {2},
pages = {453-497},
url = {https://EconPapers.repec.org/RePEc:ecm:emetrp:v:79:y:2011:i:2:p:453-497},
}
@WWW{Amadeus2018,
author = {Bureau van Dijk},
title = {Amadeus},
year = {2018},
url = {https://www.bvdinfo.com/en-us/our-products/data/international/amadeus},
urldate = {2018-11-24},
}
\end{filecontents}
\addbibresource{\jobname2.bib}
\begin{document}
\textcite{Hansen2011}
\textcite{Amadeus2018}
\printbibliography
\end{document}
However, I want to specify the citation of the data base as:
Bureau van Dijk (2018). Amadeus. Zugriff am 24.11.2018. www.bdv...
In particular I want tha first the url-date and then the internet page is listed. Furthermore they should be seperated with a dot. Finally, in contrast to the other source, I would like to replace the colon after the year in brackets with a dot.