those published in @2016PASA...33....1L [hereafter ]. Section \[SecDB\] presents the Master Catalogue database site, the X-ray catalogue tables (\[SecXrayTab\]) with associated data products (\[SecXrayDP\]), and the multi-$\lambda$ catalogue tables (\[SecMWTab\]) with associated data products (\[SecMWDP\]). Section \[SecEnd\] summarises the work. Appendix \[SecCompLSS\] compares the present catalogue with the previous XMM-LSS catalogue [@2013MNRAS.429.1652C].

X-ray material\[SecXray\]
=========================

The X-ray (XMM-Newton) observations of the XXL survey were obtained over several years in two sky regions as a collection of uniformly spaced contiguous pointings with an exposure time of at least 10 ks (complemented by a few GO pointings from the archives, and by pointings from earlier surveys, sometimes deeper). The list of the 622 XMM pointings (294 in the northern area at $\delta\sim -4.5\degr$, hereafter XXL-N; and 328 in the southern area at $\delta\sim -55\degr$, hereafter XXL-S) is given in Appendix B of (which also provides details on the observing strategy), and is available at the Centre de Données astronomiques de Strasbourg (CDS) and in our database (see section \[SecDB\] and Appendix \[SecNewApp\]).

The X-ray pipeline\[SecPipe\]
-----------------------------

We use version 3.3.2 of the <span style="font-variant:small-caps;">Xamin</span> X-ray pipeline @2006MNRAS.372..578P to process the XMM X-ray data. Earlier versions of the pipeline were used to process 