12 Copyright © 2010 Open Geospatial Consortium, Inc.
5 Symbols and Abbreviations
5.1 Abbreviations
API Application Program Interface
COM Component Object Model
CORBA Common Object Request Broker Architecture
DCE Distributed Computing Environment
DCOM Distributed Component Objected Model
DE-9IM Dimensionally Extended Nine-Intersection Model
FID Feature ID column in the implementation of feature tables based on predefined data types
GID Geometry ID column in the implementation of feature tables based on predefined data types
IEEE Institute of Electrical and Electronics Engineers, Inc.
MM Multimedia NDR
Little Endian byte order encoding OLE
Object Linking and Embedding RPC
Remote Procedure Call SQL
Structured query language, not an acronym, pronounced as sequel SQLMM
SQL Multimedia and Application Packages SRID
Spatial Reference System Identifier SRTEXT
Spatial Reference System Well Known Text UDT User
Defined Type
UML Unified Modeling Language
WKB Well-Known Binary
representation for example, geometry WKT Well-Known
Text WKTR Well-Known
Text Representation
XDR Big Endian byte order encoding
5.2 Symbols
nD n-Dimensional, where n may be any integer
ℜ
n
n-Dimensional coordinate space, where n may be any integer ∅
empty set, the set having no members ∩
intersection, operation on two or more sets ∪
union, operation on two or more sets ⎯
difference, operation on two sets ∈
is a member of, relation between an element and a set ∉
is not a member of ⊂
is a proper subset of, i.e. a smaller set not containing all of the larger ⊆
is a subset of
Copyright © 2010 Open Geospatial Consortium, Inc. XIII
⇔ if and only if, logical equivalence between statements
⇒ implies, logical implication where the second follows from the first statement
∃ there exists
∀ for all
∋ such that
f: D →
R Function f from domain D to range R
{ X | s }
set of X such that the statement s is TRUE ∧
and, logical intersection ∨
or, logical union ¬
not, logical negation =
equal ≠
not equal ≤
less than or equal to less than
≥ greater than or equal to
greater than ∂
topological boundary operator, mapping a geometric object to its boundary
6 Architecture
6.1 Geometry object model 6.1.1 Overview
