... Up: Archives and Information Services . ... The CDS has recently developed a tool for managing URLs in a context of distributed heterogeneous services (GLU, Uniform Link Generator: Fernique et al. ... This includes the development of a `URL dictionary' maintained by the data providers contributing to the system. ... But the user does not need to have an a priori knowledge of the existing services, or even of the information types corresponding to potential query results. ...

... Prototype of a Discovery Tool for Querying Heterogeneous Services D. Egret, P. Fernique and F. Genova CDS, Strasbourg, France, E­mail: egret@astro.u­strasbg.fr Abstract. ... Introduction How to help the user find his path through the jungle of information services is a question which has been raised during the past years (see e.g., Egret 1994), when it became clear that a big centralised system was not the e#cient way to go. ... All the forms are generated from the GLU Dictionary information. ...

IRAF/STECF 2-D spectrum point source / background decomposition package . ... The general problem is one of spectral decomposition - of separating the spectra of the point sources from the background. ... The STECF IRAF layered package "specres" provides two tasks to extract point source spectra from 2-D images (either longslit, multislit or cross-dispersed) and decompose the full background over the image. ... A Point Source Function spectrum image is required as a 2-D spectrum. ...