Case Studies
MediaDB is Multimedia Database Management System that creates MMDB applications to manage large volumes of multimedia objects. MediaDB is an object oriented system that supports encapsulations, inheritance hierarchies, and object management. It also supports one-to-many and many-tomany relationship between objects.
InterBase is a relational Database that has builtin support for BLOBs. It has its own interface to relational database that it manages. InterBase stores BLOBs in collection of segments. A segment in InterBase can be thought of as a fixed-length "page" or I/O block. InterBase provides special API calls to retrieve and modify segments. It allows user to open-BLOb , create-BLOB, read segmet (by get-segment) and write a segment to BLOB (put-segment).
Sybase's SQL Server supports TEXT and IMAGE data types. TEXT and IMAGE data-types can be very large up to 2GB. User can defien table as :
CREATE TABLE Page (
Number Integer ,
Content IMAGE ,
Anstract TEXT)
In terms of their internal storage representation TEXT and IMAGE column values contain pointer to firest page of multimedia column. The pages are stored as linked-list. The pages od TEXT and IMAGES colums are stored seperately fro tables of database.
XDP from Plexus is imaging database engine that provide support for BYTES and TEXT data types. A special family can be assigned to each IMAGE and TEXT column in a Table with a different storae extent or family for that tabel recors. Example :
CREATE TABEL Pages
(Number Intege,
PageImage IMAGE IN ImageFamily)
IN CompoundDocumentFamily
XDP supports hierarchial storage system, managing magnet disks, optical disks, optical jukeboxes with online, near-line (stored in the optical jukeboxes but not munted), and offline stored on a shelf) devices.
MultiMedia Datatypes in UniSQL/X Being an object relationa; database management system , UNiSQL supports most of SQL constructs. FOr multimedai data types UniSqL/X supports a class hierarchiay rooted at generalized large object (GLO) class. This class serves as the root od multimedia data types and provides a number of builot-in attributes and methods for instatiating and inheriting clients.For content of GLO objetcs user can create either Large Object (LO) or a File Based Object(FBO) . An interestin gfeature is that recovery is supported for FBOs but consisteny is not supported as external application can aloso access it. LOs are similar to BLOBs in relational databases. FBOs are stored in host file system. Two other subclasses are Audio and Image class. Audio serve as root class of various type of audio classes. Image class is the root of image types, including 2D and 3D images. It supports number of attributes and ethods(also inherited from parent classes) to support storing and manipulating data.
InterBase is a relational Database that has builtin support for BLOBs. It has its own interface to relational database that it manages. InterBase stores BLOBs in collection of segments. A segment in InterBase can be thought of as a fixed-length "page" or I/O block. InterBase provides special API calls to retrieve and modify segments. It allows user to open-BLOb , create-BLOB, read segmet (by get-segment) and write a segment to BLOB (put-segment).
Sybase's SQL Server supports TEXT and IMAGE data types. TEXT and IMAGE data-types can be very large up to 2GB. User can defien table as :
CREATE TABLE Page (
Number Integer ,
Content IMAGE ,
Anstract TEXT)
In terms of their internal storage representation TEXT and IMAGE column values contain pointer to firest page of multimedia column. The pages are stored as linked-list. The pages od TEXT and IMAGES colums are stored seperately fro tables of database.
XDP from Plexus is imaging database engine that provide support for BYTES and TEXT data types. A special family can be assigned to each IMAGE and TEXT column in a Table with a different storae extent or family for that tabel recors. Example :
CREATE TABEL Pages
(Number Intege,
PageImage IMAGE IN ImageFamily)
IN CompoundDocumentFamily
XDP supports hierarchial storage system, managing magnet disks, optical disks, optical jukeboxes with online, near-line (stored in the optical jukeboxes but not munted), and offline stored on a shelf) devices.
MultiMedia Datatypes in UniSQL/X Being an object relationa; database management system , UNiSQL supports most of SQL constructs. FOr multimedai data types UniSqL/X supports a class hierarchiay rooted at generalized large object (GLO) class. This class serves as the root od multimedia data types and provides a number of builot-in attributes and methods for instatiating and inheriting clients.For content of GLO objetcs user can create either Large Object (LO) or a File Based Object(FBO) . An interestin gfeature is that recovery is supported for FBOs but consisteny is not supported as external application can aloso access it. LOs are similar to BLOBs in relational databases. FBOs are stored in host file system. Two other subclasses are Audio and Image class. Audio serve as root class of various type of audio classes. Image class is the root of image types, including 2D and 3D images. It supports number of attributes and ethods(also inherited from parent classes) to support storing and manipulating data.
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