Mapa mental

XML

valdearg DB Inglés

Contenido del mapa

XML

Database
- Yes
  - Hierarchical
  - Unicode
  - Human readable
  - Schema languages
    - XML schema
    - DTD
  - Query languages
    - XQuery
    - XPath
  - APIs
    - SAX
    - DOM
    - JDOM
- No
  - Inefficient
    - Verbose
    - Parsing
  - Lacks common technologies
Data-centric
- XML transport
- Machine consumption
  - Structure
  - No mixed content
Doc-centric
- Human consumption
- Mixed content
- Irregular structure
XML DBs
- XML Enabled (XEDB)
  - XML exchanges
  - Relational data model
  - XML Mapping layer
    - Storage
    - Retriveal
  - No visibility
  - DB schema match XML schema
  - Relational to XML Schema mapping
    - Tables based
      - Same structure
      - Rows are tables
    - Object relational
      - Objects are tables
      - Properties to columns
      - Inter-object relationships are foreign/primary keys
- Native XML (NXD)
  - Logical model of XML doc
  - XML doc as storage
  - Physical storage not req
- Hybrid XML (HXD)