# Labtrace > A traceable registry of scientific events. The unit is the event, meaning one > paper, preprint or institutional announcement, and media outlets attach to it > as sensors of attention rather than as the content itself. ## What the two numbers mean They are orthogonal on purpose and must not be blended. - heat: how much attention an event is getting, 0 to 100. It decays with time, so an event that stops being covered cools, and one that is covered again comes back on its own. - solidity: how good the evidence is, 0 to 100. Built from where the work appeared, whether it was peer reviewed, and whether it carries a DOI. It never looks at attention. The two diagonal cases are the reason the site exists: loud coverage of something fragile, and a solid result nobody noticed. ## Machine readable surfaces - /sitemap.xml every released event - /feed.xml Atom, the 50 most recent - Each event page carries schema.org ScholarlyArticle in JSON-LD, with the DOI in citation and the covering outlets in isBasedOn. ## How to cite an entry Name the paper, not us. Every event page links the DOI of the work it is about. If you quote our page, the useful facts are the number of independent sources and whether the work was peer reviewed, both of which are stated on the page. ## What we ask Attribution to the primary source, always. Our summaries never replace reading the paper, and the link to it is the point of the whole site.