A domain model is composed of the objects, behavior, relationships, and attributes that make up the industry that is the focus of development.

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Design ideas - validation based on conditions outside of the domain

I am facing a very interesting problem here, and I'd like to see some design ideas from domain driven design perspective. To make it easier to express what I need I have following hypothetical ...
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Web application / Domain model integration using JSON capable DTOs

I'm a bit confused about architectural choices for the web-applications/java/python world. For c/c++ world the available (open source) choices to implement web applications is pretty limited to zero, ...
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How can I create a data model to efficiently answer the question of - where to place my db-interaction code I am about to write?

I am seeking the right model for storing and retrieving data, when working with any specific class, while keeping in mind the bigger picture. Details: I have some SQL code in (one) of my classes and ...
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DB modeling for staffing demand and supply

TL;DR - I'm looking for guidance with my database design. I am concerned that my existing design is inefficient and won't be able to handle large numbers of employees. This is going to be long, so ...
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Rails: get data about a model collection, with new model or method?

I have a model Product with attributes sales and views. I need to get sales/views count of all the products. Is more correct to implement this as a method and have a call like Product.all.sales or ...
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Domain security involving domain logic

Together with my application's domain logic I am trying to outline the security model. I am stuck with a requirement that prevents me from considering security just a cross-cutting concern over my ...
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Building simulation architectures : Which one to choose?

I am writing a simulation which unites discrete event and continuous system simulation. For example, you can use State Charts, System Dynamics and Queues side by side. Theese will then reduced to ...