'Arbitrary constraints' presentation slideshows

Constraints in Entity-Relationship Models

Constraints in Entity-Relationship Models. Zaki Malik September 18, 2008. Types of Constraints. Keys are attributes or sets of attributes that uniquely identify an entity within its entity set. Single-value constraints require that a value be unique in certain contexts.

943 views • 43 slides

578 views • 41 slides

Soft Types for Scheme

494 views • 34 slides

Reconciling Schemas of Disparate Data Sources: A Machine Learning Approach

The LSD Project. Reconciling Schemas of Disparate Data Sources: A Machine Learning Approach. AnHai Doan, Pedro Domingos, Alon Halevy University of Washington. wrapper. wrapper. wrapper. Data Integration. Find houses with four bathrooms priced under $500,000. mediated schema.

404 views • 23 slides

Understanding Web Query Interfaces: Best-Efforts Parsing with Hidden Syntax

Understanding Web Query Interfaces: Best-Efforts Parsing with Hidden Syntax. Zhen Zhang, Bin He and Kevin C. Chang. MetaQuerier Goals: Exploring and integrating the deep Web . FIND sources. QUERY sources. Integrator source selection schema integration query mediation. Explorer

361 views • 22 slides