HTML Microdata document

This HTML5 document contains 122 embedded RDF statements represented using HTML+Microdata notation.

The embedded RDF content will be recognized by any processor of HTML5 Microdata.

Namespace Prefixes

Prefix	IRI
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dbo	http://dbpedia.org/ontology/
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dbt	http://dbpedia.org/resource/Template:
rdfs	http://www.w3.org/2000/01/rdf-schema#
freebase	http://rdf.freebase.com/ns/
n19	http://mdfs.net/Docs/Comp/Disk/Format/
rdf	http://www.w3.org/1999/02/22-rdf-syntax-ns#
owl	http://www.w3.org/2002/07/owl#
wikipedia-en	http://en.wikipedia.org/wiki/
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dbr	http://dbpedia.org/resource/

Statements

Subject Item: dbr:List_of_file_systems
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:MK-DOS
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:BeebEm
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:Crazee_Rider
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:Elixir_(video_game)
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:Error_message
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:Watford_Electronics
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:Comparison_of_file_systems
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:BBC_Master
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:BBC_Micro
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:Disk_operating_system
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:DFS
dbo:wikiPageWikiLink: dbr:Disc_Filing_System
dbo:wikiPageDisambiguates: dbr:Disc_Filing_System

Subject Item: dbr:Acorn_Electron
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:Acorn_MOS
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:Advanced_Disc_Filing_System
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:Econet
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:Panos_(operating_system)
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:Floppy_disk_variants
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:List_of_RISC_OS_filetypes
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:Title_(command)
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:Disc_Filing_System
rdf:type: yago:Instrumentality103575240 yago:Artifact100021939 yago:Computer103082979 yago:PhysicalEntity100001930 yago:Device103183080 yago:Object100002684 yago:Machine103699975 yago:WikicatAcornComputers yago:Whole100003553
rdfs:label: Disc Filing System
rdfs:comment: The Disc Filing System (DFS) is a computer file system developed by Acorn Computers, initially as an add-on to the Eurocard-based Acorn System 2. In 1981, the Education Departments of Western Australia and South Australia announced joint tenders calling for the supply of personal computers to their schools. Acorn's Australian computer distributor, Barson Computers, convinced Joint Managing Directors Hermann Hauser and Chris Curry to allow the soon to be released Acorn BBC Microcomputer to be offered with disk storage as part of the bundle. They agreed on condition that Barson adapted the Acorn DFS from the System 2 without assistance from Acorn as they had no resources available. This required some minor hardware and software changes to make the DFS compatible with the BBC Micro.
dbp:name: DFS
dct:subject: dbc:Disk_file_systems dbc:Acorn_Computers
dbo:wikiPageID: 1702003
dbo:wikiPageRevisionID: 1050219481
dbo:wikiPageWikiLink: dbr:ASCII dbr:Acorn_MOS dbr:RISC_OS dbr:Acorn_User dbr:Read-only_memory dbr:Operating_system dbr:Escape_character dbc:Disk_file_systems dbr:Control_character dbr:BBC_Master dbr:BBC_Micro dbr:Can't_extend dbr:File_system dbr:File_system_fragmentation dbr:Western_Digital_FD1771 dbr:IBM_Personal_Computer dbr:Macro_(computer_science) dbr:Watford_Electronics dbr:Kilobyte dbr:Shell_script dbr:Fragmentation_(computing) dbr:Frequency_modulation dbr:Hermann_Hauser dbr:Modified_Frequency_Modulation dbr:Working_directory dbr:Chris_Curry dbr:BBC_BASIC dbr:Floppy_disk dbr:Advanced_Disc_Filing_System dbr:Floppy_disk_variants dbr:PATH_(variable) dbr:Acorn_System_2 dbr:Intel dbr:The_Micro_User dbr:Acorn_Computers dbr:Acorn_Electron dbc:Acorn_Computers
dbo:wikiPageExternalLink: n13:DFS.rtf n13:WatfordDFS.txt n19:DFS
owl:sameAs: n15:4ivWp wikidata:Q5281381 yago-res:Disc_Filing_System freebase:m.05plkk
dbp:wikiPageUsesTemplate: dbt:Infobox_filesystem dbt:Multiple_issues dbt:File_systems dbt:Start_date_and_age dbt:Reflist dbt:Refimprove dbt:BBC_Computer_Literacy_Project dbt:Manual
dbp:developer: dbr:Acorn_Computers
dbp:fullName: Disc Filing System
dbo:abstract: The Disc Filing System (DFS) is a computer file system developed by Acorn Computers, initially as an add-on to the Eurocard-based Acorn System 2. In 1981, the Education Departments of Western Australia and South Australia announced joint tenders calling for the supply of personal computers to their schools. Acorn's Australian computer distributor, Barson Computers, convinced Joint Managing Directors Hermann Hauser and Chris Curry to allow the soon to be released Acorn BBC Microcomputer to be offered with disk storage as part of the bundle. They agreed on condition that Barson adapted the Acorn DFS from the System 2 without assistance from Acorn as they had no resources available. This required some minor hardware and software changes to make the DFS compatible with the BBC Micro. Barson won the tenders for both states, with the DFS fitted, a year ahead of the UK. It was this early initiative that resulted in the BBC Micro being more heavily focused on the education market in Australia, with very little penetration of the home computer market until the arrival of the Acorn Electron. The DFS shipped as a ROM and Disk Controller Chip fitted to the BBC Micro's motherboard. The filing system was of extremely limited functionality and storage capability, using a flat directory structure. Each filename can be up to seven letters long, plus one letter for the directory in which the file is stored. The DFS is remarkable in that unlike most filing systems, there was no single vendor or implementation. The original DFS was written by Acorn, who continued to maintain their own codebase, but various disc drive vendors wrote their own implementations. Companies who wrote their own DFS implementations included Cumana, Solidisk, Opus and Watford Electronics. The Watford Electronics implementation is notable for supporting 62 files per disc instead of the usual 31, using a non-standard disc format. Beyond that, the Solidisk implementation introduced proprietary "chained" catalogues which allowed unlimited files per disc (only constrained by the disk size). Other features in third-party implementations included being able to review free space, and built-in FORMAT and VERIFY commands, which were shipped on a utility disc with the original Acorn DFS. Acorn followed up their original DFS series with the Acorn 1770 DFS, which used the same disc format as the earlier version but added a set of extra commands and supported the improved WD1770 floppy drive controller chip.
dbp:attributes: Directory character, Load address, Execution address, Locked
dbp:badBlocksStruct: None
dbp:compression: No
dbp:dateRange: N/A
dbp:datesRecorded: None
dbp:directoryStruct: Single catalogue of 31 fixed length records
dbp:encryption: No
dbp:fileStruct: Start-Length entries
dbp:fileSystemPermissions: No
dbp:filenameCharacterSet: ASCII
dbp:forksStreams: No
dbp:introductionOs: dbr:Acorn_MOS
dbp:maxFileSize: 255
dbp:maxFilenameSize: 7
dbp:maxFilesNo: 31
dbp:maxVolumeSize: 256
dbp:os: dbr:Acorn_MOS
dbp:partitionId: None
gold:hypernym: dbr:System
prov:wasDerivedFrom: wikipedia-en:Disc_Filing_System?oldid=1050219481&ns=0
dbo:wikiPageLength: 19359
foaf:isPrimaryTopicOf: wikipedia-en:Disc_Filing_System

Subject Item: dbr:File_system_fragmentation
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:Unified_Emulator_Format
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:Sideways_address_space
dbo:wikiPageWikiLink: dbr:Disc_Filing_System

Subject Item: dbr:Disk_Filing_System
dbo:wikiPageWikiLink: dbr:Disc_Filing_System
dbo:wikiPageRedirects: dbr:Disc_Filing_System

Subject Item: dbr:Acorn_DFS
dbo:wikiPageWikiLink: dbr:Disc_Filing_System
dbo:wikiPageRedirects: dbr:Disc_Filing_System

Subject Item: wikipedia-en:Disc_Filing_System
foaf:primaryTopic: dbr:Disc_Filing_System