London Registry meeting 19–20 March 2003 André Schaaff GLU – Générateur de Liens Uniformes Three sides : –GLU dictionary maintaining URLs according to.

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Presentation transcript:

London Registry meeting 19–20 March 2003 André Schaaff GLU – Générateur de Liens Uniformes Three sides : –GLU dictionary maintaining URLs according to data types or resource names –GLU filter substituting data type and resource name tags for the generated URLs. Parameters management. –GLU daemon maintaining on each participating service a global dictionary. Mirror site tests.

London Registry meeting 19–20 March 2003 André Schaaff The GLU in a few words Distributed repository of Web server URL templates (35 replicated sites – 500 descriptions) written 7 years ago by the CDS Library toolkit to play with the GLU (gludic, glufilter…)

London Registry meeting 19–20 March 2003 André Schaaff …advanced functionalities.. Clone site management Automatic parameter conversions Authenticated records Multi-domains of distribution Remote GLU resolution by cgi

London Registry meeting 19–20 March 2003 André Schaaff Quick illustration 1994A&A F abstract: we present the initial results keywords: galaxies: individual:... Stored information Simbad query (Stbg) id.pl?Ident=$1 Identifier/coordinates 1994A&A F abstract: we present the initial results keywords: galaxies: individual: <A HREF= " id.pl?Ident=M31">M A&A F abstract: we present the initial results keywords: galaxies: individuals: M 31 GLU global dictionary GLUd Service #1 Service #2 Service #3 After GLU filter Web page global dictionary specific dictionary

London Registry meeting 19–20 March 2003 André Schaaff A GLU record

London Registry meeting 19–20 March 2003 André Schaaff Aladin algorithm – step 1 Look for the nearest GLU implementation –Standalone: local GLU installation, otherwise default minimal GLU dictionary and remote GLU access –Applet: use remotely the GLU installation of the applet server

London Registry meeting 19–20 March 2003 André Schaaff Scans all GLU records distributed in the GLU domain "ALADIN" Builds the data server forms corresponding to these GLU records. All server access will be done by a GLU call (locally or remotely) Aladin algorithm – step 2

London Registry meeting 19–20 March 2003 André Schaaff Our choice (6 years ago): GLU evolutions by putting more information in GLU records. And the evolution ?

London Registry meeting 19–20 March 2003 André Schaaff Other access/use to/of the GLU GLU distributes WSDL definitions => (%WSDL field) Web Service for the tag resolving Web Service for the gludic access …

London Registry meeting 19–20 March 2003 André Schaaff Dictionary browser : displays the dictionary by entry, by domain,... Allow execution of any URL with provided parameters.

London Registry meeting 19–20 March 2003 André Schaaff Conclusion Open to all discussions Two important sides : –The GLU philosophy –The GLU implementation (language, system, etc.) GLU main links : Documentation and project follow-up : GLU dictionary browser : Last reference : a paper submitted at ESSW03 Budapest 20 May 2003