L07 - Information Systems and Data Semantics Flashcards
Data Semantics
“Semantic data is the information that allows machines to understand the meaning of information. It describes the technologies and methods that convey the meaning of the information.” (Sir Tim Berners-Lee)
Digital Assistants (DA) like Siri, Alexa, OK Google and others completely depend on the semantics of the underlying data sets to provide meaningful data.
Entity Relationship Model (ERM)
A entity relationship model basically looks like a mind map where the different entity are linked together. The “arrows” convey the action which is made between two entities like with C-Map Tools.
A special form of the ERM is the ERP Sales Order.
Cloud Services
Infrastructure as a Service (IaaS): A service that provides access to technical infrastructure (e.g. compute, storage, network components and other IT resources)
Platform as a Service (PaaS): These are platform-based service allowing to develop, run and manage applications. The underlying infrastructure is part of the service and is managed by the platform provider. (IaaS + PaaS)
Software as a Service (SaaS): This a ready to use service that is provided via the internet. The customer accesses the software via a web browser or API based on a subscription model. (IaaS + PaaS + SaaS)
On Premises have everything at your company while IaaS, PaaS and SaaS are partly managed by others. SaaS completely and then it is nearly straight line down to on-premises (Slide 18).
ERP on Premises vs ERP Cloud
On Premises:
• Maximum Control: The control of the system and application is completely in the hands of the owner
• Unlimited Access: You can access the data and services without the internet access
• Security: All data are stored within the company and are not handed over to someone else (access of the data is restricted by the owner)
Cloud:
• Flexibility in Functions: I can activate and deactivate services and functions based on my current demands
• Flexibility in Location: I can use systems all over the world. The provider is taking care to sync data across time zones
• Flexibility to Compute: I can increase and decrease the amount of computational resources I need for specific processes or points in time
• Backup and Data Loss: The data are regularly backed up and stored across different systems.
SAP ERP in the Cloud
SAP Business ByDesign: Manage your business with a single cloud ERP solution for fast-growing, mid-market businesses to scale and compete without the complexity and cost.
SAP S/4HANA Cloud is the enterprise focusing, intelligent and integrated ERP system that runs on our in-memory database, SAP HANA
