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We recognize that this would be a useful feature. We have considered using a
standardized multi-lingual topic classification and a keyword thesaurus.
Implementing this on a systematic basis is complex and requires significant resources Many of the datasets listed in our catalog are collected from external
catalogs, implementing multi-lingual topic classifications and a keyword
thesaurus would require all our contributing catalogs to do the same. This would
be difficult to achieve and reduce the number of surveys we can include in our
portal. Such a system may be considered in the future.
