Matcher selection

Duchateau F (2009) Towards a generic approach for schema matcher selection Leveraging user pre- and post-match effort for improving quality and time performance. PhD thesis, Uni-versite Montpellier II - Sciences et Techniques du Languedoc, http //tel.archives-ouvertes.fr/ tel-00436547/en/... 

There are many types of photochromic and thermochromic materials. Due to the introductive nature and consequent brevity of this work, only selected subject areas will be examined. This work is intended to introduce product designers, chemists, color matchers, and laboratory technicians to the special colorant area of photo-and thermochromics. 

As indicated in Fig. 1. lb, the individual matchers may either be executed sequentially, independently (in parallel), or in some mixed fashion. In the sequential approach, the matchers are not executed independently, but the results of initial matchers are used as input by subsequent matchers. A common strategy, e.g., used in Cupid (Madhavan et al. 2001), is to first execute a linguistic matcher to compare the names of schema elements and then use the obtained similarities as input for structure-based matching. In the parallel matcher strategy, individual matchers are autonomous and can be independently executed from other matchers. This supports a high flexibility to select matchers for execution and combination. Furthermore, these matchers may also physically be executed in parallel, e.g., on multicore or multiserver hardware. On the other hand, the autonomy of individual matchers may introduce redundant computations, e.g., of name similarities to be used for structural matching. The mixed strategy combines sequential and parallel matcher execution and is thus most complex. 

Peukert et al. (2010a) propose the use of filter operators within match work-flows to prune dissimilar element pairs (whose similarity is below some minimal threshold) from intermediate match results. The threshold is either statically predetermined or dynamically derived from the similarity threshold used in the match workflow to finally select match correspondences. Peukert et al. (2010a) also propose a rule-based approach to rewrite match workflows for improved efficiency, particularly to place filter operators within sequences of matchers. 

Rimom is an ontology matching prototype developed at Tsinghua University in Beijing, China (Li et al. 2009). It was one of the first systems implementing a dynamic selection of matchers, as discussed in Sect. 3.3. The schema elements and their instances are first linguistically matched structural matching is only applied if the schemas exhibit sufficient structural similarity. There are several methods for... 

Gal A, Sagi T (2010) Tuning the ensemble selection process of schema matchers. Inform Syst 35(8) 845-859... 

Although most matchers simply provide a graphical user interface to visualize the results, recent works have pointed out a need for selecting the best strategy. For instance, including some mechanisms to easily update the weights of a function so that users can directly analyse impacts of these changes. 

The selection of a schema matcher is obviously not a parameter it does not fit with the definitions provided in Sect. 2. But this is likely meta-tuning since one first needs to choose a schema matcher before tuning its parameters and using it. Furthermore,... 

Color Labs. Color matching is a complicated art and/or science. Color matchers must balance the designers aesthetic desires with the engineers required physical properties. This is not always an easy task. It is often difficult to achieve the color and physical properties in the desired resin. Interaction between designers and engineers provides a forum for selecting colorants and end part colors based on economics and/or performance. This improves the ability to achieve a good and reproducible color match. 

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