This paper presents the state-of-the-art of the world-wide project DML Digital Mathematical Library which aims to provide availability and open access, through digital format, to the whole of maths documents (more or less 50 million pages). DML will include collections of both past literature (print document that have been digitalized) and digital documents. There are various subjects involved in the process: libraries, universities, publishers, projects and maths society at the national and international level. The time span of the project is estimated to be ten years and the whole budget 100 million dollars. In addition, the project’s aim is to develop a link between existing different experiences of digitalization thank to common model network. There are various problems to cope with: copyright, form, archiving. There are a lot of issue where it is necessary to take a decision: the selection of contents, the technical standards and the format of metadata. These issues were debated during the meeting which took place in Berlingen (Costanza’s Lake) from 31st of January to 3rd of February 2003. Italy, too, took part in the conference. During the brainstorming the working groups – established in order to gather information useful to the request of funding within the 6th Framework Programme of the European Union - developed the fundamental guidelines for the plan and creation of the European project UE Digital Math Library.