English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

In this paper, we study the usage of negation in JSON Schema data modeling.Negation is a logical operator that is rarely present in type systems andschema description languages, since it complicates decision problems. As aconsequence, many software tools, but also formal frameworks for working withJSON Schema, do not fully support negation. As of today, the question whethercovering negation is practically relevant, or a mainly theoretical exercise(albeit challenging), is open. This motivates us to study whether negation isreally used in practice, for which aims, and whether it could be - in principle- replaced by simpler operators. We have collected the most diverse corpus ofJSON Schema documents analyzed so far, based on a crawl of 90k open sourceschemas hosted on GitHub. We perform a systematic analysis, quantify usagepatterns of negation, and also qualitatively analyze schemas. We show thatnegation is indeed used, following a stable set of patterns, with the potentialto mature into design patterns.

An Empirical Study on the "Usage of Not" in Real-World JSON Schema Documents (Long Version)