How the register is made
Last updated: 11 October 2026
On this page 7
Where the notices come from
Every notice on Aperlena was first published by an official source: Tenders Electronic Daily (TED), the European Union's journal of public procurement, and national and regional public procurement portals, 102 sources in all. We read them through the official APIs, feeds and open data files they offer, and every notice page links to the official notice it comes from. The sources and their terms of reuse are listed in the legal notice.
How often we read them
Each source is read on its own schedule, from every hour to once a day, following how often it publishes. A notice that changes at its source is read again and updated here, and its page keeps a record of what changed and when.
When a call is open
A call is open until its deadline. Restricted, negotiated and similar procedures often publish only a deadline for requests to participate: that is the date we show, and the page says which deadline it is. A call that states no deadline at all is counted as closed 120 days after it was published, and a prior information notice 395 days after: nearly every procedure that does state a deadline closes well within that time.
Sectors and amounts
An open or upcoming notice is listed under every CPV code it declares, the main one and the additional ones, so a search by sector finds it whichever code it falls under. Statistics count each notice under its main code only, so nothing is counted twice. Amounts in other currencies are shown in euros at the European Central Bank reference rate, and the original amount is kept.
What software writes
The translated titles and the short summaries are written by AI language models and marked as machine-generated. They can be wrong: the official notice is always the reference, one link away. Figures such as when a contract is likely to be tendered again, or how open a market is to new suppliers, are computed from the register's own history and say so where they appear.
One page per procedure
When the same procedure is published by two sources, often TED and a national portal, we keep one page for it and send the other address to that page.
Errors and corrections
If you find a mistake, write to hello@aperlena.com or use the contact page. We correct errors in our own data as soon as we can; an error in the official notice is for its publisher to correct, and the corrected version appears here once they publish it.