# retain only the domain name of url and print in bibliography as organisation

How can I define a command to retain only the domain name of a link e.g. http://www.google.com/search?=bang will give only google.com and display it as organisation field for a url reference?

Many Thanks

This is really a non-trivial request, and I strongly advise to fill out the organization field manually (your least problem is capitalisation of the organization's name: you would not want url = {http://nssdc.gsfc.nasa.gov/planetary/factsheet/moonfact.html} to come out as organization = {nasa}, but organization = {NASA}).

Some more or less useful solution as a proof of concept with biblatex and biber.

This sourcemap goes into the preamble.

\DeclareSourcemap{
\maps[datatype=bibtex]{
\map[overwrite=false]{
\step[fieldsource=url, match=\regexp{^((?:f|ht)tps?://)?(?:www\.)?([^/]+)}, final]
\step[fieldset=organization, fieldvalue={$2}] } } } It tries to extract the domain part of a URL from the url field and maps it to the organization field. Since getting rid of sub-domains is not a trivial task especially if you take into account that there are TLDs like .co.uk, .info, .de, .com etc., these are still included. \documentclass{article} \usepackage[style=authoryear, backend=biber]{biblatex} \usepackage{hyperref} \usepackage{filecontents} \begin{filecontents}{\jobname.bib} @ELECTRONIC{MEMSnet, title = {What is {MEMS}?}, url = {http://www.memsnet.org/mems/what_is.html}, urldate = {2013-12-01}, } \end{filecontents} \addbibresource{\jobname.bib} \addbibresource{biblatex-examples.bib} \DeclareSourcemap{ \maps[datatype=bibtex]{ \map[overwrite=false]{ \step[fieldsource=url, match=\regexp{^((?:f|ht)tps?://)?(?:www\.)?([^/]+)}, final] \step[fieldset=organization, fieldvalue={$2}]
}
}
}

\begin{document}
\nocite{MEMSnet,wilde,markey}
\printbibliography
\end{document}

gives

Both issues mentioned above can be observed here: One would probably want to see MEMSnet instead of memsnet.org, and CTAN instead of tug.ctan.org.