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Object-Role Modeling (ORM) is a fact-based approach to data modeling that expresses the information requirements of any business domain simply in terms of objects that play roles in relationships. All facts of interest are treated as instances of attribute-free structures known as fact types, where the relationship may be unary (e.g. Person smokes), binary (e.g. Person was born on Date), ternary (e.g. Customer bought Product on Date), or longer. Fact types facilitate natural expression, are easy to populate with examples for validation purposes, and have greater semantic stability than attribute-based structures such as those used in Entity Relationship Modeling (ER) or the Unified Modeling Language (UML). All relevant facts, constraints and derivation rules are expressed in controlled natural language sentences that are intelligible to users in the business domain being modeled. This allows ORM data models to be validated by business domain experts who are unfamiliar with ORM's graphical notation. For the data modeler, ORM's graphical notation covers a much wider range of constraints than can be expressed in industrial ER or UML class diagrams, and thus allows rich visualization of the underlying semantics. Suitable for both novices and experienced practitioners, this book covers the fundamentals of the ORM approach. Written in easy-to-understand language, it shows how to design an ORM model, illustrating each step with simple examples. Each chapter ends with a practical lab that discusses how to use the freeware NORMA tool to enter ORM models and use it to automatically generate verbalizations of the model and map it to a relational database.

*Feel at ease with essential tips on culture, manners, idioms and multiple meanings *Order with confidence, explain food allergies, and try new foods with the menu decoder *Save time and hassles with vital phrases at your fingertips *Never get stuck for words with the 3500-word two-way, quick-reference dictionary *Be prepared for both common and emergency travel situations with practical phrases and terminology *Meet friends with conversation starter phrases *Get your message across with easy-to-use pronunciation guides Inside Lonely Planet Italian Phrasebook & Dictionary: *Full-colour throughout *User-friendly layout organised by travel scenario categories *Survival phrases inside front cover for at-a-glance on-the-fly cues *Convenient features *5 Phrases to Learn Before You Go *10 Ways to Start a Sentence *10 Phrases to Sound like a Local * Listen For - phrases you may hear * Look For - phrases you may see on signs * Shortcuts - easy-to-remember alternatives to the full phrases Object-Role Modeling Fundamentals : A Practical Guide to Data Modeling with Orm download PDF * Q&A - suggested answers to questions asked *Covers *Basics - time, dates, numbers, amounts, pronunciation, reading tips, grammar rules *Practical - travel with kids, disabled travellers, sightseeing, business, banking, post office, internet, phones, repairs, bargaining, accommodation, directions, border crossing, transport *Social - meeting people, interests, feelings, opinions, going out, romance, culture, activities, weather *Safe Travel - emergencies, police, doctor, chemist, dentist, symptoms, conditions *Food - ordering, at the market, at the bar, dishes, ingredients The Perfect Choice: Lonely Planet Italian Phrasebook & Dictionary, a pocket-sized comprehensive language guide, provides on-the-go language assistance; great for language students and travellers looking to interact with locals and immerse themselves in local culture.

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Author: Terry Halpin
Number of Pages: 192 pages
Published Date: 15 May 2015
Publisher: Technics Publications LLC
Publication Country: Bradley Beach, United States
Language: English
ISBN: 9781634620741
Download Link: Click Here
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