Syntactical heuristics for the open data quality assessment and their applications

Open Government Data are valuable initiatives in favour of transparency, accountability, and openness. The expectation is to increase participation by engaging citizens, non-profit organisations, and companies in reusing Open Data (OD). A potential barrier in the exploitation of OD and engagement of the target audience is the low quality of available datasets [3, 14, 16]. Non-technical consumers are often unaware that data could have potential quality issues, taking for grant that datasets can be used immediately without any further manipulation. In reality, in order to reuse data, for instance to create visualisations, they need to perform a data clean, which requires time, resources, and proper skills. This leads to a reduced chance to involve citizens. This paper tackles the quality barrier of raw tabular datasets (i.e. CSV), a popular format (Tim-Berners Lee tree-stars) for Governmental Open Data. The objective is to increase awareness and provide support in data cleaning operations to both PAs to produce better quality Open Data and non-technical data consumers to reuse datasets. DataChecker is an open source and modular JavaScript library shared with community and available on GitHub that takes in input a tabular dataset and generate a machine-readable report based on the data type inferencing (a data profiling technique). Based on it the Social Platform for Open Data (SPOD) provides quality cleaning suggestions to both PAs and end-users.