Catálogo Colectivo de la Red de Lectura Pública Valenciana : logros y problemas tras 21 meses de funcionamiento

The paper analyze 21 months of functioning of the online Union Catalogue of the Valencian Public Reading Network. It splits of initial situation of state of computerization in the year 2000 of the Valencian public libraries to explainthe different stages of the program: Establishment of aims, previous merger of catalogues and planning of migration of catalogues in phases and according to SIGBs, problems and adopted measurements, results reached after 21 months of functioning, statistical information, creation of parallel projects (Portal of Valencian Libraries, Valencian Union Catalogue, Xabib, Groups of works in net …) and future lines of work. In sum, an experience of results very positive, but whose process demands a constant adoption of measures for the resolution of effects