Documentation/Maemo 5 Developer Guide/Architecture/Data Management

Contents

[edit] Software context

Data management subsystem has the following relationships.

  • Toolkit: This domain provides the set of lowlevel libraries like widgets that are used by the Data Management components. The Data Management provides for this layer the virtual file system and input methods.
  • RTCOM: Depends on the addressbook functionality provided by the Data Management
  • Applications: Generally applications depend on the file- and MIME-handling provided by the data management domain.
  • Connectivity: The virtual file system in data management is depending on the libraries provided by the connectivity. They are used when hiding the connecting to Bluetooth and network folders.
  • System: Data management uses the system hardware information provided by the system domain.
  • Multimedia Framework: Uses Data Management to access the file on different drivers and devices.


ULM diagram of data management
Data management software context

[edit] System Decomposition View

Diagram of data management domain
Data management domain

[edit] Contacts (Addressbook)

Purpose
Provides a general framework to store the contact and presence information. It is used especially by the RTCOM domain for handling their contact and presence information.
Responsibilities
  • Store contact information
  • Store presence information
  • Provide information about contact’s capabilities
License
Nokia/LGPL/GPL

[edit] Package management

Description
Provides a way of managing the installed packages on the device. This also includes installing new versions of the components, for example when updating the device,
Responsibilities
  • Manage component and application installation
  • Manage component updates
License
GPL

[edit] Backup

Purpose
Provides a general framework to backup and restore user’s data.
Responsibilities
  • Restore data
  • Backup user’s data
License
Nokia

[edit] File Management

Purpose
Provides whole stack for file management. This includes file access, virtual file system, mime handling and URI schema handling. The domain also provides the UI that is needed for the file access.
Responsibilities
  • Virtual file system (gnome-vfs)
  • Mime handling (libhildonmime)
  • Widgets for file handling (hildon-fm)
  • File manager
License
Nokia/LGPL

[edit] Content Handling (Tracker)

Purpose
Provide a one stop solution for all metadata, tags, shared object databases, search tools and indexing.
Responsibilities
  • Provides an Indexer, a lightweight daemon that extracts information from files (trackerd)
  • Tracker Search Tool, a small GUI to search for indexed data
  • Command line tools for searching, querying the daemon status, and tagging
  • libtracker, a C wrapper around the D-Bus API.
License
GPL/LGPL
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