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Overview of a data-modeling context: Data model is based on Data, Data relationship, Data semantic and Data constraint. A data model provides the details of information to be stored, and is of primary use when the final product is the generation of computer software code for an application or the preparation of a functional specification to aid a computer software make-or-buy decision.
Online dating services charge users a fee to post profiles, perhaps using video or still images, descriptive data, and personal preferences for dating, such as age range, hobbies, and so forth. Online dating was a $2 billion per year industry, as of 2014, with an annual growth rate of 5%.
A semantic data model is an abstraction which defines how the stored symbols relate to the real world. Thus, the model must be a true representation of the real world. [8] The purpose of semantic data modeling is to create a structural model of a piece of the real world, called "universe of discourse".
Hypergamy (colloquially referred to as "dating up" or "marrying up" [1]) is a term used in social science for the act or practice of a person dating or marrying a spouse of higher social status or sexual capital than themselves. The antonym "hypogamy" [a] refers to the inverse: marrying a person of lower social class or status (colloquially ...
A physical model (most commonly referred to simply as a model but in this context distinguished from a conceptual model) is a smaller or larger physical representation of an object, person or system. The object being modelled may be small (e.g., an atom ) or large (e.g., the Solar System ) or life-size (e.g., a fashion model displaying clothes ...
The inverted file data model can put indexes in a set of files next to existing flat database files, in order to efficiently directly access needed records in these files. Notable for using this data model is the ADABAS DBMS of Software AG, introduced in 1970. ADABAS has gained considerable customer base and exists and supported until today.
The original imaging model of PDF was opaque, similar to PostScript, where each object drawn on the page completely replaced anything previously marked in the same location. In PDF 1.4 the imaging model was extended to allow transparency. When transparency is used, new objects interact with previously marked objects to produce blending effects.
An entity–relationship model (or ER model) describes interrelated things of interest in a specific domain of knowledge. A basic ER model is composed of entity types (which classify the things of interest) and specifies relationships that can exist between entities (instances of those entity types).