Block compression provides better compression ratios compared to In this section, we will describe the considerations for good schema design for data. MongoDB uses dynamic schemas, meaning that you can create records MongoDB was also designed with high availability and scalability in mind,. The schema diagram renders all the XML Schema components and allows you to quickly navigate to the refere...

In this paper we present Document analysis and classification system to segment and classify contents of Arabic document images. This system includes preprocessing, document segmentation, feature extraction and document classification. A document image is enhanced in the preprocessing by removing noise, binarization, and detecting and correcting image skew. In document segmentation, an algorith...

Nowadays Wireless Sensors Networks (WSN) are intensively used for environment monitoring. As a bridge to the physical world, WSN can gather handy data even in hazard sites. Access to hazard data is particularly crucial when anticipating risks of disasters. When integrated into the Web of Things and a Big Data database, the WSN offers a promising way to sketch an online picture of the monitored ...

In this paper, we consider MongoDB, a widely adopted but not formally understood database system managing JSON documents and equipped with a powerful query mechanism, called the aggregation framework. We provide a clean formal abstraction of this query language, which we call MQuery. We study the expressivity of MQuery, showing the equivalence of its well-typed fragment with nested relational a...

Document databases are becoming popular, but how to present complex document query to obtain useful information from the document remains an important topic to study. In this paper, we describe the design issues of a pattern-based document database query language named JPQ. JPQ uses various expressive patterns to extract and construct document fragments following a JSON-like document data model...

There is an emerging amount of software for generating, manipulating and storing XML documents, which remain valid according to a given DTD or an XML Schema. Common solutions are often based on the W3C’s Document Object Model (DOM), which has evolved to an important collection of language independent interfaces allowing to represent and manipulate any single XML document. Databases containing m...