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Questions tagged [conceptual-model]

Conceptual modeling is the art of visualizing the conceptual model. Conceptual model is a model made of the composition of concepts, that thus exists only in the mind. Conceptual models are used to help us know, understand, or simulate the subject matter they represent.

The term conceptual model may be used to refer to models which are formed after a conceptualization process in the mind.
Conceptual models represent human intentions or semantics. Conceptualization from observation of physical existence and conceptual modeling are the necessary means human employ to think and solve problems.

Concepts are used to convey semantics during various natural languages based communication. Since a concept might map to multiple semantics by itself, an explicit formalization is usually required for identifying and locating the intended semantic from several candidates to avoid misunderstandings and confusions in conceptual models.

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Conceptual modelling scenario

I am very new to Database Design and I have been practising with as many questions as I can. I happened to come across the below question (No, this is not my assignment!) and from what I could understand, I have created the attached conceptual…
Chaos
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Trouble Conceptualizing Android File System Access

I want my app to automatically load data from a file at startup & then display a summary of this data for the user. I thought this would be simple, but... I almost had it working, but found out that it would be tricky putting the data file on the…
Todd Hoatson
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ER to Relational model: what happens when a subclass has its own PK?

Conceptual Model | I have not been able to find any example of a subclass with it's own PK. I understand that the primary key, person_id, is inherited from the superclass, but I do not know whether it combines with the subclass' PK, employee_id, to…
user7732395
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can a conceptual model have this?

I was told by a student that a conceptual model includes major entities and their relationships but not such high detail level of information about the attributes and their values. Is this true? Is this the limitation to the conceptual model?
LearningToProgram
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How te create suggestions in database?

I want to develop a small musical library. My objective is to add an idea of suggestions for users : A user adds musics into the application, he is not connected at all, it's anonymous. When a user open or close the application, we send his library…
Vincent Rossignol
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Define relationship dependent on another relationship in conceptual-model

I need to help to define a relationship in conceptual model for database. I'm doing it in PowerDesiner. I have 3 entities (let's call them A, B and C). A doesn't have to have B, if A has B then only once. B has to have at least one A. B may have C,…
Grim
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Is there an absolute model answer for Entity-Relationship diagram?

Hi I am new to conceptual data modelling and is currently working on entity-relationship diagrams. Just some questions that I am not able to find an answer to: I am designing an E-R diagram based on a given scenerio and as I match my answers…
mercycue
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UML class diagram conceptual schema

I have done a UML diagram but I think I have done it wrong for the parts stated below (and shaded grey in the picture). Any help and advice is appreciate. :) Thanks. Rules: An office is usually occupied by only one academic staff member.…
user23
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Entities for conceptual design

I just started playing around with a conceptual design and I'm doing some simple examples just to get some good practice. Besides doing Book examples, I started asking friends what they do at work and that way I try to practice. Anyways, all I care…
Ris
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Tool for EER Modeling

Is there a good free conceptual modeling tool for EER modeling? It should support specialization, generalizaton, union, etc. I came across MySQL Workbench but it seemed to belong to the physical modeling stage(examples that I saw included 'VARCHAR'…
user1909491
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Looking for feedback on Data Model

I'm taking a Coursera course called Advanced Data Modeling and practiced creating a conceptual model as well as a logical ER diagram. The prompt gave me the following fields and said to create a data model using them: Order ID Client name Client…
Jason Minhas
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Database - conceptual model design

We have a task to model following situation using conceptual ERD model: We have teachers and students. Students belong into groups. The teachers can teach different lessons/courses, while a course can be taught by different teacher. Each group has…
ST Renegade
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Conceptual Graph - inspired database

I'm looking for the database using the idea of conceptual graphs proposed by John F. Sowa
Shishkin Pavel
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How to normalize a recursive relationship? (Conceptual to logical)

conceptual ERD of a recursive relationship
Crystacune
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