The Object Management Group's (OMG) Model Driven Architecture (MDA) strategy envisages a world where models play a more direct role in software production, being amenable to manipulation and transformation by machine. Model Driven Engineering (MDE) is wider in scope than MDA. MDE combines process and analysis with architecture. This article sets out a framework for model driven engineering, which can be used as a point of reference for activity in this area. It proposes an organisation of the modelling 'space' and how to locate models in that space. It discusses different kinds of mappings between models. It explains why process and architecture are tightly connected. It discusses the importance and nature of tools. It identifies the need for defining families of languages and transformations, and for developing techniques for generating/configuring tools from such definitions. It concludes with a call to align metamodelling with formal language engineering techniques.

Model Driven Engineering

The technology underlying text search engines has advanced dramatically in the past decade. The development of a family of new index representations has led to a wide range of innovations in index storage, index construction, and query evaluation. While some of these developments have been consolidated in textbooks, many specific techniques are not widely known or the textbook descriptions are out of date. In this tutorial, we introduce the key techniques in the area, describing both a core implementation and how the core can be enhanced through a range of extensions. We conclude with a comprehensive bibliography of text indexing literature.

/pdf/inverted-files-for-text-search-engines-1fgfjm96s3.pdf

Inverted files for text search engines

Variants of Naive Bayes (NB) and Support Vector Machines (SVM) are often used as baseline methods for text classification, but their performance varies greatly depending on the model variant, features used and task/dataset. We show that: (i) the inclusion of word bigram features gives consistent gains on sentiment analysis tasks; (ii) for short snippet sentiment tasks, NB actually does better than SVMs (while for longer documents the opposite result holds); (iii) a simple but novel SVM variant using NB log-count ratios as feature values consistently performs well across tasks and datasets. Based on these observations, we identify simple NB and SVM variants which outperform most published results on sentiment analysis datasets, sometimes providing a new state-of-the-art performance level.

Baselines and Bigrams: Simple, Good Sentiment and Topic Classification

KEY BENEFIT: Written by a leader in the field of information retrieval, this text provides the background and tools needed to evaluate, compare and modify search engines. KEY TOPICS: Coverage of the underlying IR and mathematical models reinforce key concepts. Numerous programming exercises make extensive use of Galago, a Java-based open source search engine. MARKET: A valuable tool for search engine and information retrieval professionals.

Search Engines: Information Retrieval in Practice

An automated software production system is provided, in which system requirements are captured, converted into a formal specification, and validated for correctness and completeness. In addition, a translator is provided to automatically generate a complete, robust software application based on the validated formal specification, including user-interface code and error handling code.

Automatic software production system

Any books that you read, no matter how you got the sentences that have been read from the books, surely they will give you goodness. But, we will show you one of recommendation of the book that you need to read. This trec experiment and evaluation in information retrieval is what we surely mean. We will show you the reasonable reasons why you need to read this book. This book is a kind of precious book written by an experienced author.

TREC: Experiment and evaluation in information retrieval

Existing tools for building and deploying complex Web sites are inadequate for dealing with the software production process that involves connecting with underlying logic in a unified and systematic way. As a solution, we propose the OO-H method, an object-oriented software approach that captures relevant properties involved in modeling and implementing Web application interfaces.

Conceptual modeling of device-independent Web applications

The OO-Method approach for information systems modeling: from object-oriented conceptual modeling to automated programming

Traditionally, Web applications have had great limitations in the usability and interactivity of their user interfaces. To overcome these limitations, a new type of Web applications called rich Internet applications (RIAs) has recently appeared providing richer and more efficient graphical components similar to desktop applications. However, RIAs are rather complex and their development requires the designing and implementation tasks which are time-consuming and error-prone. Moreover, RIA development is a new challenge for the Web engineering methodologies requiring their modification and the introduction of other concerns. In this context, we propose a new approach called OOH4RIA which proposes a model-driven development process that extends OOH methodology. It introduces new structural and behavioural models in order to represent a complete RIA and to apply transformations that reduce the effort and accelerate its development. This RIA will be implemented on the promising Google Web toolkit (GWT) framework.

/pdf/a-model-driven-development-for-gwt-based-rich-internet-27x5x8rjfm.pdf

A Model-Driven Development for GWT-Based Rich Internet Applications with OOH4RIA

This article presents OO-HMethod, an extension of the OO-Method conceptual modelling approach to address the particulars associated with the design of web interfaces. It is based on the OO-Method class diagram, which captures the statics of the system. The design of the interface appearance and the navigation paths are driven by the user navigation requirements. To achieve its goal, OO-HMethod adds several navigation and interface constructs to the OO-Method conceptual model, which define the semantics suitable for capturing the specific functionality of web application interfaces. A new kind of diagram, the 'Navigation Access Diagram' (NAD) is introduced. All the concepts represented in the NAD are stored in a repository, and from there a functional interface is generated in an automated way. One of the main contributions of this paper is not the proposal of yet another method for web modelling but the extension of an existing conceptual modelling approach.

/pdf/extending-a-conceptual-modelling-approach-to-web-application-1r7lzzlsko.pdf

Jaime Gómez

Papers

TREC: Experiment and evaluation in information retrieval

Conceptual modeling of device-independent Web applications

The OO-Method approach for information systems modeling: from object-oriented conceptual modeling to automated programming

A Model-Driven Development for GWT-Based Rich Internet Applications with OOH4RIA

Extending a Conceptual Modelling Approach to Web Application Design