The extraction of information from text is very important for language understanding. There are different kinds of expressions that can be extracted; temporal expressions (timexes) are one kind of these expressions. A temporal expression, as the name says, contains some information about time present in a text. Some examples of timexes are: 1 day, 3…
Read MoreThe large availability of Open Data sources encoded in different formats makes the processing and interoperability of these sources difficult. One possible solution (among several others) is to translate the data sources into a common and well-known format, such as JSON documents. One common source format, prior to its publication, is data encoded using the…
Read MoreWe recently got a Demo paper accepted at EDBT 2019 describing our HOTMapper tool that enables defining and storing mappings of Open Data sources into an integrated data source in MonetDb. The tool is currently used to store and manage mappings of educational Open Data made available yearly by INEP. The resulting mapped data source…
Read MoreCreating drawings of an architecture, of an algorithm, or even of writing a full algorithm in the blackboard or in a piece of paper is an important step when doing R&D in Computer Science. There are some tools that enable online drawings, but I prefer the hand-coded ones! Recently, I browsed through my photo gallery…
Read MoreOur research group has been working on a portal for open educational resources (Plataforma MEC de recursos educacionais digitais) with the objective to gather OERs from different sources and to provide social networking functionalities (resource ‘liking’, followers, user reputation, and others), with the main objective of easing the search of good qualility resources. In a…
Read MoreIn information extraction frameworks, finding a matching for a word in a text is a very common issue. The matching is often done based in a given input dictionnary. This task is called Named Entity Recognition (NER). This task is useful to classify the words in the text. For instance, we could have a dictionnary…
Read MoreWe have been working on different initiatives to process large amounts of open data and to produce useful information, for instance, the Educational Data Lab or the Web Portal for Educational Resources. One recurrent difficulty is the initial data analysis and transformations, where it is necessary to understand the data before loading it into some…
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