Introduction to Cardinality and Modality
Elements of data modelling such as data objects attributes and relationships provide the basis for understanding the information domain such as what are the composite information s, its properties and how are they interrelated but such information is not sufficient. For example we can say that where are two data objects A and B with attributes a1,a2,a3..............an and b1.b2,b3...........b m respectively. They are related to each other by relation R as shown in fig 4.3
This information is not sufficient. We must also know how many elements of A are related to how many elements of B by relation R. This concept is called cardinality. There may be some cases when a defined relationship is not mandatory. This concept is called as modality.
Cardinality: Cardinality is the specification of number of occurrences of one object that can be related to number of occurrences of another object. It is usually expressed as either one or many. It generally defines the maximum number of objects that can participate in a relationship. On the basis of cardinality a relationship can be one to one (1:1) one to one (1: M) many to many (M-M).
Modality: Modality of a relationship is represented by 1 if it is mandatory 0 if it is not mandatory.
Latest technology based Software Engineering Online Tutoring Assistance
Tutors, at the www.tutorsglobe.com, take pledge to provide full satisfaction and assurance in Cardinality and Modality homework help via online tutoring. Students are getting 100% satisfaction by online tutors across the globe. Here you can get homework help for Cardinality and Modality, project ideas and tutorials. We provide email based Cardinality and Modality homework help. You can join us to ask queries 24x7 with live, experienced and qualified online tutors specialized in Cardinality and Modality. Through Online Tutoring, you would be able to complete your homework or assignments at your home. Tutors at the TutorsGlobe are committed to provide the best quality online tutoring assistance for Software Engineering homework help and assignment help services. They use their experience, as they have solved thousands of the software engineering assignments, which may help you to solve your complex issues of Cardinality and Modality. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.
www.tutorsglobe.com assignment help tutorials : the phases of operation research - or are defining the problem and collecting data, creating a mathematical model, obtaining solutions from the model, checking the model.
tutorsglobe.com pure exchange and pareto optimality assignment help-homework help by online intermediate microeconomics tutors
Premium Strategic Financial Management Assignment Help is available 24x7 to resolve all your queries at affordable prices to score A++
Classes, structures and naming of Alcohols tutorial all along with the key concepts of Classes of Alcohols, Monohydric, Dihydric, Trihydric, Primary alcohol, Secondary alcohol, Tertiary alcohol, Naming Alcohols and Physical Properties of Alcohols
tutorsglobe.com complex formation assignment help-homework help by online general characteristics of d-block elements tutors
Theory and lecture notes of Problems in NP-complete all along with the key concepts of problems in np-complete, Complexity P & NP, CLIQUE theorem. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Problems in NP-complete.
partially miscible liquids tutorial all along with the key concepts of homogeneous and heterogeneous solutions, partial miscibility and immiscibility, partially miscible liquid systems, immiscible liquid pairs and concept of distribution law
www.tutorsglobe.com offers reaction characteristics homework help, reaction characteristics assignment help, online tutoring assistance, organic chemistry solutions by online qualified tutor's help.
tutorsglobe.com mullikens scale assignment help-homework help by online electronegativity scales tutors
Bryophyta and Pteridophyta tutorial all along with the key concepts of Life Cycles of bryophyta and pteridophyta, characteristics of Liverworts, Moses and Pteridophytes-Ferns
Theory and lecture notes of Calculating Real GDP all along with the key concepts of calculating real gdp, Real GDP, Inventories and Imputations. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Calculating Real GDP.
tutorsglobe.com measurement of consumers surplus assignment help-homework help by online consumer surplus tutors
Relieve your academic burden with PhD Digital Circuitry Assignment Help experts at affordable prices and score impeccable grades.
tutorsglobe.com forms of capital assignment help-homework help by online capital tutors
Methodology Used In Job Costing - It is essential to recognize the costs related with the job and represent it in the form of job cost sheet for showing several types of costs.
1945400
Questions Asked
3689
Tutors
1492781
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!