Object-Role Modeling (ORM) Diagrams

The vector stencils library "ORM diagram" contains 32 object-role modeling (ORM) notation symbols.
Use it to design your ORM diagrams with ConceptDraw PRO software in data modeling and software engineering.
The vector stencils example "Design elements - ORM diagram" is included in ORM Diagrams solution from Software Development area of ConceptDraw Solution Park.

This object-role modeling (ORM) diagram sample shows schema for particular lithology.
It was designed on the base of the Wikimedia Commons file: Schema for Particular Lithology.gif. [commons.wikimedia.org/ wiki/ File:Schema_ for_ Particular_ Lithology.gif]
"The Particular Lithology schema (Figure 5) models the description of a particular rock. The information system should include a set of idealized "typical' Particular Lithology entities associated with each General Lithology to provide default values for characteristics not specified in the General Lithology definition. The Particular Lithology entity will also be used for the description of rock hand samples. A Particular Lithology is modeled as an aggregate of Constituents. The Constituents may be Mineral or other Particular Lithology entities, allowing for recursive description. Each Constituent may be involved in one or more Relationship_ within_ Whole associations (see Table 1 for examples) with the Particular Lithology." [pubs.usgs.gov/ of/ 1999/ of99-386/ richard.html]
The object-role model example "Particular lithology ORM diagram" was designed using ConceptDraw PRO software extended with ORM Diagrams solution from Software Development area of ConceptDraw PRO Solution Park.

This object-role modeling (ORM) diagram sample shows disjunctive mandatory role constraint.
It was designed on the base of the Wikimedia Commons file: 9 DisjunktyvusPrivalomumoRibojimas.jpg. [commons.wikimedia.org/ wiki/ File:9_ DisjunktyvusPrivalomumoRibojimas.jpg]
"2.7. Mandatory Role Constraints.
The ORM 1 tool indicates simple mandatory constraints by a solid dot either (a) at the intersection of an entity type shape and the line connecting it to a role, or (b) at the role end. Option (b) is needed to avoid ambiguity when an object type plays many mandatory roles whose connections to the object type are too close to distinguish which role the dot applies to. Currently, disjunctive mandatory (inclusive-or) constraints are depicted by placing the solid dot in a circle connected by dotted lines to the roles it applies to. ORM 2 retains this notation, except that the solid dot is consistently colored violet and a global configuration option determines the default placement of simple mandatory dots at the role or object type end. Users may override this global setting on an individual role basis." [www.orm.net/ pdf/ ORM2_ TechReport1.pdf]
The object-role model example "Disjunctive mandatory constraint ORM diagram" was designed using ConceptDraw PRO software extended with ORM Diagrams solution from Software Development area of ConceptDraw PRO Solution Park.

This object-role modeling (ORM) diagram sample shows schema for constituent geometry. It was designed on the base of the Wikimedia Commons file: Schema for Constituent Geometry.gif. [commons.wikimedia.org/ wiki/ File:Schema_ for_ Constituent_ Geometry.gif]
"Constituent Geometry... models a data structure for describing the geometry of individual constituents in a Particular Lithology. These descriptions are based on terms that may have qualitative or quantitative definitions (e.g. round, subround, euhedral, subhedral, fine-grained) or on free text descriptions referenced by "descID'. The Constituent Geometry description has two sub-classes, Grain Geometry and Body Geometry, because different terminology is used when describing individual grains or lithologic components in a mixed rock." [pubs.usgs.gov/ of/ 1999/ of99-386/ richard.html]
The object-role modeling diagram example "Constituent geometry ORM diagram" was designed using ConceptDraw PRO software extended with ORM Diagrams solution from Software Development area of ConceptDraw PRO Solution Park.