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Metasearchers Benchmarking

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Metasearchers Benchmarking. Jose Maria Carrion. 2nd Conference National Digital Libraries of Health (Sevilla, 2008)

Metasearchers Benchmarking. Jose Maria Carrion. 2nd Conference National Digital Libraries of Health (Sevilla, 2008)

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  • 1. Metasearchers Benchmarking José Mª Carrión Pérez Andalusian Public Health System Virtual Library February 20-21, 2008. Seville
  • 2. 1. Introduction Last decades we opened the way in our institutions to the hybrid library, and the electronic collection was constituted as a library quality indicator is not enough a good collection of electronic resources, from now on the evaluation will also fix its attention in the digital portal, the success of the information architecture (AI) and its functionalities
  • 3. This takes us to consider a specific human team is needed, with a group of deep knowledge and in permanent bring up to date. the Library should have a budgetary departure, in order to maintain chapter like in that of investments, for the maintenance of the portal, the librarians should confront the administration of the contents in the portal as a new activity area Today's library would be that considers the best form of applying the technology to satisfy the necessities and expectations of the user(1) (1) Enjolras M. Bibliotecas, nuevos servicios y tecnología: entrevista con Jerry Kline, Innovative Interface INC. El profesional de la información 2006;15(1):65-74.
  • 4. 2. Objectives This report revises a series of suppliers of Libraries Management Systems products (LMS) and other library products to which we will call system of portals library(2) •Metalib & SFX •Zportal •Millenium Access Plus (MAP) •Search Solver •Sirsi SingleSearch These last ones are sophisticated tools to create portals where to harbor and to negotiate resources of information, including electronic resources, own resources or acquired by license. (2) Cox A, Yeates R. Library orientated portals solutions. 2002. Consulted en 14-01-08. Available from: http://www.museglobal.com/PDF/Library%20Oriented%20Portals%20Solutions.pdf
  • 5. 3. Material and Methods To carry out the study, we considered three parameters: the available literature on those “Library Portals” and metasearchers the information given by the suppliers of Library Management Systems (LMS) and tabulated through an insole of 81 items contained in 13 areas(3) the results and the evaluation of the same ones through a series of equations of searches replied in each metasearcher (3) Chvatal D. ALA 2003 Midwinter report. Biblio tech review. 2003. Consulted 09-02-08 Available from: URL: www.biblio-tech.com/btr11/ALA_2003_MW_Complete.cfm
  • 6. 4. What is the Library Portals? they are tools constituted by two differentiated components: the user's interface and that of the librarian. •The first one allows to present them resources of the library in a structured way and its offers search tools and recovery of the information in the whole collection. •With second tool, the librarians describe and structure the contents (electronic review, databases, e-books, opacs, etc.) that will be shown in the user's interface. It is necessary to differ among “library portals” and mere traversals searchers since it usually confuses yourself. A “library portal” it is characterized to prepare: •A administration module of electronic resources so much at cataloguing level as of diffusion •A module of user administration and access licenses to the electronic resources •A metasearcher •Environments personalized for the users •A module of use statistical
  • 7. 5. What is a metasearcher? It is a system that allows the unified access (unique Interface) to multiple systems and resources of information (databases, OPAC's, Gateways, etc..). It carries out a search simultaneously in a selection of databases and electronic resources. When receiving an application, the system metasearcher determines which systems possess in its base of knowledge and which are appropriate to interrogate and to obtain information. It looks for, it organizes, it structures and it sends the information to the user that carried out this search(4). they should look for and to recover information of a great systems variety(5;6) and metadatos models that include: • Open norms (Z39.50, open Norms, OAI-PMH, SRW/SRU, http, MARC, DOI, SQL, EAD, TEI, XML, Dublin Core, etc..) • Methodologies Owners. • System of local Information (4) Gomez Dueñas LF, Correa M. AT. Metabúsqueda: integrando colecciones y mejorando la difusión. XII Jornadas de actualización en bibliotecas médicas. 2005. Consulted el 22-12-07 Available from: http://eprints.rclis.org/archive/00004849/02/ponencia_unirecs.pdf (5) Benítez H, Robayo S. Protocolo Z39.50 una herramienta importante en la recuperación de la información. 2007. Consulted el 7-12-07 Available from: http://eprints.rclis.org/archive/00009877/01/PROTOCOLO_Z39_50.pdf (6) Arango de V. ME. El Z39.50 en el ambiente de transferencia y recuperación de información. Revista Interamericana de Nuevas Tecnologías de la Información 2000;5(1):18-24.
  • 8. Interface of usuary Service Provider Search Display Results 1 Translate / Comunicate 4 Process Results Gateway Z39.50 DataBase XML 2 Server OAI-PMH 2 OpenURL OAI-PMH Gateway Resolver Data Provider DOI, SQL, EAD, TEI, Dublin Core, etc. Server Server Z39.50 Z39.50 3 E-journals Access direct to records/documents Data Base DataBase DataBase DataBase DataBase DataBase 2 2 2 2 2 3 conectors conectors
  • 9. 6. Results It checks 12 sections(3,7) that they should keep in mind when metasearchers are evaluated with in the following one “Agree” or evaluation insole: S: Yes. The product completes the requirement Section A. Search functions (4 ptos) N: No. The product doesn't complete the Section B. User personalisation functions requirement (0 ptos) D: Unknown. The producer doesn't provide Section C. Access control functions information in this respect (0 ptos) P: Partially. The product completes the Section D. Database communication protocols supported requirement partially (2 ptos) F: Future. The product will complete the Section E. Platform requirement in the next version (1 pto) Section F. Data Base Predefined Section G. Personalization platform Section H. Integration SGB •Metalib & SFX Section I. Delivery of final document Section J. Statistics •Zportal Section K. Link resolver •Millenium Access Plus (MAP) Section L. Vendor support •Search Solver •Sirsi SingleSearch (3) Chvatal D. ALA 2003 Midwinter report. Biblio tech review. 2003. Consulted 09-02-08 Available from: URL: www.biblio- tech.com/btr11/ALA_2003_MW_Complete.cfm (7) Dorner DG, Curtis AM. A comparative review of common user interface software products for libraries. National Library of New Zealand. 2003. Consulted 08-02-08 Available from: URL: www.natlib.govt.nz/catalogues/library-documents/common-user- interface-software
  • 10. Section A. Search functions X r SF lv e So & b l ta ch ali or p rsi et ar Ma ZP M Se Si Does it provide an unified search? S S S S S Does it provide connections to the interfaces of the different resources offered by the library? S S S S S Does it provide an interface of simple search? S S S S S Does it provide an interface of advanced search? S S N S S One or more Web-based OPAC databases can be searched? S S S S S Broadcast searching of websites and Internet search engines? S S S S S Broadcast searching of citations and full-text in databases by keyword? S S S S S Broadcast searching of all databases by field? S S S S S Field searching of individual databases? S S S S S Boolean searching ? S S S S S Wildcard and truncation searching? S S S N S Proximity searching? N N S N S Results are ranked for relevancy? S N N S S Results can be limited by any field? P S P P S Results can be sorted by any field in ascending or descending order? S S P S S Searching using diacritics [including macrons] is supported? S N S N S Results returned from different databases can be merged? S S S S S Results returned from different databases can be de-duplicated? S S S S S TOTAL PUNCTUATION 66 60 64 58 72 % FULFILLED CRITERIA 91.6% 83.3% 88.8% 80.5% 100%
  • 11. In the section search functions all the searchers overcome an acceptable minimum of 58 points on 72. It highlights Sirsi, followed Metalib and Map. In this aspect all the metasearchers completes the approaches but interesting: •Boolean searching •Wildcard and truncation searching •Results are ranked for relevancy •Searching using diacritics (including macrons) is supported •Results returned can be de-duplicated 70 60 50 Metalib Zportal 40 Map 30 Search Solver 20 Sirsi 10 0
  • 12. Section B. User personalisation functions X r SF lv e So & b l ta ch ali or p rsi et ar Ma ZP M Se Si Can the user establish his visualization preferences? S N S S S Can the user establish his search preferences? S P S S S Can the user settle down alerts? S F F F S Can the user create groups of favorite? S N N S S Search history is recorded? S S P N P Users can specify fields to include when printing or downloading results? N N N N S Users can select which records from search results to print or download? S S S S S Results can be downloaded to bibliographic software? S F S N P Users can print to results? S S S S S TOTAL PUNCTUATION 32 16 23 21 32 % FULFILLED CRITERIA 88.8% 33.3% 63.8% 58.3% 88.8%
  • 13. In the section User personalisation functions the metasearchers shows remarkable disparities. It highlights Sirsi and Metalib (even) followed by Map. Zportal is shown quite rigid. In this aspect Metalib completes the approaches but interesting: •Can the user establish his visualization preferences? •Can the user establish his search preferences? •Can the user settle down alerts? •Results can be downloaded to bibliographic software? 35 30 25 Metalib Zportal 20 Map 15 Search Solver 10 Sirsi 5 0
  • 14. Section C. Access control functions X r SF lv e So & b l ta ch ali or p rsi et ar Ma ZP M Se Si Authorisation based on IP address S S S S S Authorisation based on a single user password S S S S S Authorisation based on domain name S N S N S Authorisation based on LDAP S S S S S Authorisation based on proxy server S F S S S Authorisation based on Shibbolett S S N N F TOTAL PUNCTUATION 24 17 20 16 21 % FULFILLED CRITERIA 100% 70.8% 83.3% 66.6% 88.8%
  • 15. In the section Access control functions the metasearchers shows remarkable disparities. Metalib highlights followed by Sirsi. In this aspect Metalib completes the approaches but interesting: •Authorisation based on ip address •Authorisation based on to it sails user password •Authorisation based on domain •Authorisation based on Shibbolett •Authorisation based on proxy server 35 30 25 Metalib Zportal 20 Map 15 Search Solver 10 Sirsi 5 0
  • 16. Section D. Database communication protocols supported X r SF lv e So & b l ta ch ali or p rsi et ar Ma ZP M Se Si Z39.50 S S S S S ERL S S S S S OpenURL S S S S S HTTP S S S S S MARC S S S S S DOI S S S S S SQL S S S N S EAD S P S P S TEI S S S P N XML S S S S S DublinCore S P S P S Vendor products only N P N S S Other standards [please specify] S N S N S TOTAL PUNCTUATION 48 42 48 34 48 % FULFILLED CRITERIA 92.3% 80.7% 92.3% 65.3% 92.3%
  • 17. In the section Database communication protocols supported the metasearchers shown enough similarity. It highlights Metalib, Sirsi and Map. In this aspect all they complete the communication protocols, to exception of Zportal and Search Solver: 50 40 Metalib 30 Zportal Map 20 Search Solver Sirsi 10 0
  • 18. Section E. Platform X r SF lv e So & b l ta ch ali or p rsi et ar Ma ZP M Se Si Windows S S S S S Macintosh N N S N N Linux S N S N F Otros Unix S S S S N Sun Solaris S S S D S TOTAL PUNCTUATION 16 12 20 8 9 % FULFILLED CRITERIA 80% 60% 100% 40% 45% Section F. Data base predefined resources X r SF lv e So & b l ta ch ali or p rsi et ar Ma ZP M Se Si Does the company landlady of the software provide resources preconfigure (databases, OPACs, etc.)? S S S S S Is the database modernized periodically by the company landlady of the product? S S N S S Can the database be enlarged indefinitely in function of the number of available resources? S S S S S TOTAL PUNCTUATION 12 12 8 12 12 % FULFILLED CRITERIA 100% 100% 66.6% 100% 100%
  • 19. Section E. Platform 20 Most of the metasearchers are implemented satisfactorily 18 in the operative but representative systems. 16 Search Solver and Sirsi is those but poor in this sense. 14 Metalib 12 Zportal 10 Map 8 Search Solver 6 Sirsi 4 2 0 Section F. Data base predefined resources In this section every metasearcher achieves the maximum of punctuation, except for Map that stays above the 14 acceptable minimum. 12 10 Metalib Zportal 8 Map 6 Search Solver 4 Sirsi 2 0
  • 20. Section G. Personalization platform X r SF lv e So & b l ta ch ali or p rsi et ar Ma ZP M Se Si Database groups can be defined for specific client groups S S S S S Default display fields can be set S P S P S Results displays can be customised S P S P S The design of user interfaces can be custom S P S S S Different user interfaces can be created for each client group S N S N S Different access levels can be assigned for each client group S S S S S Results can be linked to document delivery services S S F P P Library name, logos, images and links can be added to interface S S S S S Interface colour scheme can be modified S S S S S Printing and downloading options are simple to find and use S S S S S Help options are available on every page S S S S S The software is capable of suspending a potentially long search at a predetermined point and providing the user with options to narrow or terminate the S P S P S search, examine a portion of the results or continue the search. TOTAL PUNCTUATION 48 36 45 36 46 % FULFILLED CRITERIA 100% 75% 93.7% 75% 95.8%
  • 21. In the section Personalization platform, all the metasearchers shown to be sufficiently customizable 50 45 40 35 Metalib 30 Zportal 25 Map 20 Search Solver 15 Sirsi 10 5 0
  • 22. Section H. Integration SGB X r SF lv e So & b l ta ch ali or p rsi et ar Ma ZP M Se Si Does it allow the integration between the portal and the local SGB? S S S S S Is information of local funds provided? S N P N S Does it allow the integration between the portal and external SGB? S P S P S TOTAL PUNCTUATION 12 6 10 6 12 % FULFILLED CRITERIA 100% 50% 83.3% 50% 100% 20 18 16 14 Metalib 12 Zportal 10 Map 8 Search Solver 6 Sirsi 4 2 0
  • 23. Section I. Delivery of final document X r SF lv e So & b l ta ch ali or p rsi et ar Ma ZP M Se Si Does it allow to discharge the final documents in the hard disk of the user's computer? S S S S S Does it allow to send the final documents by mail electronic? S S S S S TOTAL PUNCTUATION 8 8 8 8 8 % FULFILLED CRITERIA 100% 100% 100% 100% 100% 10 8 Metalib 6 Zportal Map 4 Search Solver Sirsi 2 0
  • 24. Section J. Statistics X r SF lv e So & b l ta ch ali or p rsi et ar Ma ZP M Se Si Transaction logs and usage statistics can be obtained S S S S S TOTAL PUNCTUATION 4 4 4 4 4 % FULFILLED CRITERIA 100% 100% 100% 100% 100% 10 8 Metalib 6 Zportal Map 4 Search Solver Sirsi 2 0
  • 25. Section K. Link resolver X r SF lv e So & b l ta ch ali or p rsi et ar Ma ZP M Se Si Does it incorporate a link resolver? S S S S S TOTAL PUNCTUATION 4 4 4 4 4 % FULFILLED CRITERIA 100% 100% 100% 100% 100% 10 8 Metalib 6 Zportal Map 4 Search Solver Sirsi 2 0
  • 26. Section L. Vendor support X r SF lv e So & b l ta ch ali or p rsi et ar Ma ZP M Se Si Vendor provides installation and initial support S S S S S The software is provided to libraries for installation N N N S S Full documentation is included in the price of the product S S S S S Technical support is readily available S S S S S Libraries can join a product listserv S N N N N In-house training is provided S S S S S Other support is provided S S S S S TOTAL PUNCTUATION 24 20 20 24 24 % FULFILLED CRITERIA 85.7% 71.4% 71.4% 85.7 85.7% 30 25 20 Metalib Zportal 15 Map Search Solver 10 Sirsi 5 0
  • 27. Total results Representing all the sections with the computation of their items, the results is the following global graph of the “Agree” or evaluation insole Map is located in 280 Metalib adds 300 points points followed by ZPortal and below him Sirsi with with 237 and Search 294 Solver with 231 300 294 300 280 250 237 231 Metalib 200 Zportal 150 Map Search Solver 100 Sirsi 50 0
  • 28. 7. Comparative starting from a practical supposition To conclude, we outlined a practical series of 10 suppositions that replied in the five metasearchers (MetaLib, ZPortal, MAP, SearchSolver, Sirsi), to evaluate the behavior of each one of them. Two databases were selected from the meta finding resources: • MEDLINE • ISI PROCEEDINGS and a portal of electronic magazines: • SCIENCE DIRECT The searches are very closed, that is to say, very sensitive and precise, for what you/they throw small results that we browsed, to try to evaluate the relevance of the same ones and to determine the quality and exahustiveness of the metasearchers. Of all the thrown searches, we will illustrate this final phase of the comparative one with the following example:
  • 29. Practical supposition A clinical has a patient, 24 year-old woman. A hairdresser that presents numerous episodes of different migraine intensity from the 14 years, beginning retroocular, unilateral localization (varying in the different crises), pulsatil, associated to nauseate and vomits, of 24-48 hours of duration. To alleviate the pain she uses paracetamol, but the answer to the same one it is scarce, improving fundamentally with dream and rest. After normal physical and neurological exploration. Analytic and cranial TC without discoveries worthy of mention, he take the decision to put a treatment prophylaxis migraine, but he has doubts between the use of the flunarizine or a beta blockers (propanolol). For he requests it articles that help you in their clinical decision, where results of preventive treatments are evaluated with the employment of the two active principles. Search equation: Migraine AND (flunarizine AND betablockers) The results of the behavior of each one of them, with the same search equation are reflected in the following chart.
  • 30. M Z P E P S S U T O E O S B A R A L I M L T M R V R A C E Author Títle Year Resource E I A S D B L P H R I 1 Hoffmann, J Treatment of migraine 2007 MEDLINE X ¤ ¤ ¤ ¤ ¤ 2 Pharmacological prevention of migraine: to be considered 2006 MEDLINE X ¤ ¤ ¤ ¤ ¤ case by case. 3 Members of the task EFNS guideline on the drug treatment of migraine - report of 2006 MEDLINE X ¤ ¤ ¤ ¤ ¤ force: an EFNS task force. 4 Evers, S Treatment of idiopathic headache in childhood - 2002 MEDLINE X ¤ ¤ ¤ ¤ ¤ recommendations of the German Migraine and Headache Society (DMKG) 5 Massiou, H Prophylactic treatments of migraine 2000 MEDLINE X ¤ ¤ ¤ ¤ ¤ COMPARATIVE IN OTHER RESOURCES 6 Massiou, H Prophylactic treatments of migraine. 2000 ISI Proceedings ¤ 7 Diener, H.C. Important advances in headache 2004 Science Direct ¤ ¤ ¤ 8 Schoenen, J. Evoked potentials and transcranial magnetic stimulation in 2003 Science Direct ¤ ¤ ¤ migraine: published data and viewpoint on their... 9 Kihara, M. The potency of migraine prophylaxis with nilvadipine: eight 2001 Science Direct ¤ ¤ ¤ cases reported with further consideration 10 Adelman, J.U. Current options for the prevention and treatment of migraine 2001 Science Direct ¤ ¤ ¤ Table 1
  • 31. Results To bird view, all respond well. Above 80% of satisfaction. In a resource Z39.50 (Medline), the metasearchers implements the search equation appropriately and they coincide in 100% with the results that it throws the native source with the same interrogation syntax. The differences begin to be evident in those resources where it is necessary the use of a gateway. The design of the same one and the characteristics of the operation of the motor of search of each metasearcher, they determine the quality of the obtained results. They notably highlight low this shade, MetaLib, MAP and Sirsi, to the being the only ones which return registrations in the resources ISI Proceedings and Science Direct. It is necessary to highlight that MAP, not only returns 4 references of Science Direct of the table 1, but rather it also recovers, 6 references from the same portal of magazines: 1. Prophylactic activity of increasing doses of intravenous histamine in refractory igraine: Retrospective observations of a series of patients with migraine without aura. Current Therapeutic Research, Volume 65, Issue 1, January-February 2004, Pages 70-78 Umberto Pietrini, Massimo De Luca, Enrico Del Bene, Francesco De Cesaris, Luca Bertinotti, Nicola Colangelo and Alberto Moggi Pignone 2. Behavioral and prophylactic pharmacological intervention studies of pediatric migraine: an exploratory meta-analysis. Pain, Volume 60, Issue 3, March 1995, Pages 239-255 Christiane Hermann, Mirihae Kim and Edward B. Blanchard 3. Pharmacological versus non-pharmacological prophylaxis of recurrent migraine headache: a meta-analytic review of clinical trials. Pain, Volume 42, Issue 1, July 1990, Pages 1-13 Kenneth A. Holroyd and Donald B. Penzien 4. Rapid method for estimating the risk of acutely controversial side effects of prescription drugs. Journal of Clinical Epidemiology, Volume 43, Issue 5, 1990, Pages 433-439 Hans Petri, Hubert Leufkens, Jack Naus, Reinhilde Silkens, Paulien Van Hessen and John Urquhart 5. Choice of antihypertensive drug therapy. American Heart Journal, Volume 114, Issue 4, Part 2, October 1987, Pages 1030-1040 B. N. C. Prichard and B. Tomlinson 6. MIGRAINE. The Lancet, Volume 326, Issue 8447, 20 July 1985, Pages 167-168. Peter Kandela
  • 32. In these 6 references of MAP, it is not completed the search equation thoroughly, not appearing in none of them the word “flunarizine”, but if “migraine” and “betablockers.” The idiosyncrasy of each metasearcher basically obeys two shades: • The quality, rigor and bring up to date of the gangplanks • The algorithms that each metasearcherr implements automatically in the meta findings. the graph shows the quality and relevance of As for the quantity of returned references: answer of the metasearchers: 16 16 100 14 90 80 12 MetaLib 70 MetaLib 10 10 9 ZPortal 60 ZPortal 8 MAP 50 MAP 40 SearchSolver 6 5 5 SearchSolver 30 Sirsi 4 Sirsi 20 2 10 0 0
  • 33. 8. Conclusions l ap ZPorta M Metalib r lve Sirsi So c h e ar S
  • 34. 8. Conclusions The great quantity of information and the notable increase of databases ends in the necessity of carrying out simultaneous consultations with a single strategy (query). Of this necessity those denominated arise “metasearchers” The results of the search can be satisfactory or not so much. The metasearchers offers very different results before oneself initial question; this fact demonstrates the little exhaustive(8) and it shows the derived problems of the shortage of linguistic control At the moment one pleads for the incorporation of tools of linguistic analysis and terminological control in the metasearchers, so that it is possible to make a less bound recovery to the comparison of character chains and more linked to the comparison of concepts The metasearchers allows to carry out a first exploratión(9) on a topic and to locate the information of available interest quickly in different databases (8) Murray R. La National Library for Health del Reino Unido usa un nuevo motor de búsqueda. El profesional de la información 2006;15(1):49-52. (9) Metafind. ESADE 2008 Consult 02-02-08. Available from: http://www.esade.edu/biblio/metafindabout.html
  • 35. It will be useful when: •I don't know in what database to begin to look for •I want to have a panoramic of the different available types of information •I want to determine what database it contains more information on a topic •I want to make a quick and simple search •I want to make sure of not forgetting any possible resource of interest •I want to find an article that I don't remember in what database it is available It is necessary to keep in mind that, depending on the objective of our search, the metasearchers cannot be the best option because: •It doesn't look for in all the available resources (only in a selection) •It cannot offer the same prestations(10) of advanced search that the databases, since it doesn't seek to substitute the sophisticated search that can be carried out in each one of the native sources •The search for subject(11) in many cases it is not sufficiently precise(8;9) (it cannot use the thesauruses of each database) (8) Murray R. La National Library for Health del Reino Unido usa un nuevo motor de búsqueda. El profesional de la información 2006;15(1):49-52. (9) Metafind. ESADE 2008 Consult 02-02-08. Available from: http://www.esade.edu/biblio/metafindabout.html (10) Silió T. Fundamentos tecnológicos del acceso abierto: OpenArchives Initiativey Open Archival Information System. El profesional de la información 2005;14(5):365-80. (11) Weibel S, Koch T. The Dublin Core Metadata Initiative: mission, current activities, and future directions. D-lib magazine 2000;6(12):1-10.
  • 36. They should not be used as tool for the investigation in depth. To obtain the best result the most advisable thing it is to look for in the different databases for separate, the sophisticated search options that they offer taking advantage. The handling and control of the existent digital information at the present time, it has generated new challenges and problems(12) that require to be treated and solved: Quality and relevancy in the recovery of information. the initiative of files open search to create a great system of universal scientific knowledge, with the meta date of all the existent academic information. Editorial vs open access. He concentrates on the facilities for the diffusion and the accessibility of the scientific information through Internet. The access initiative open of Budapest (Budapest Open Access Initiative), it is the first link that looks for to liberate all the contents and to leave them you liberate within reach of the humanity. Interaction among systems of information. The metasearchers should of to be compatible in a great systems(13) through the communication protocols, (Z39.50, open Norms, OAI-PMH, SRW/SRU, http, MARC, DOI, SQL, EAD, TEI, XML, Dublin Core, etc..). (12) Arango de V. ME. El Z39.50 en el ambiente de transferencia y recuperación de información. Revista Interamericana de Nuevas Tecnologías de la Información 2000;5(1):18-24. (13)Gomez Dueñas LF, Correa M. AT. Metabúsqueda: integrando colecciones y mejorando la difusión. XII Jornadas de actualización en bibliotecas médicas 2005. Consult 22-12-07. Available from: http://eprints.rclis.org/archive/00004849/02/ponencia_unirecs.pdf
  • 37. Of the five evaluated metasearchers, Metalib next to Sirsi, seems a good option. They highlight the clarity of their interface, the relevance and exahustiveness of their results and the possibilities of handlings of these. Map, is the third better option. ZPortal and Search Solver stays above the acceptable minima for a metasearcher Anything they serve the interoperability, the meta data, the metasearchers, the agents of connections, the technology able to summarize, of index and of processing natural language, if there is not quality in the information It is not enough with “everything” is accessible, but rather it is necessary that it is accessible “all that I need and only that” in a certain moment. One can say that one of the big impediments of the OA (Open Access) it will be the overabundance of information, and he leaves in detriment of the metasearchers. To offer scientific information doesn't only consists on giving open access, but in giving pertinent open access (pertinent open access, POA) Editors and suppliers of information need to be but informed on the implications of the libraries in the library portals, to evolve all together and to obtain metasearchers but precise: this is the great challenge, don't they seem…?
  • 38. Thank you for their attention! José Mª Carrión Pérez Andalusian Public Health System Virtual Library