Extended Attributes: Difference between revisions
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Extended Attributes (EA) are a property of directories as well as of files. | Extended Attributes (EA) are a property of directories as well as of files. | ||
Implementation depends on underlying [[file systems]]. | |||
==Functions== | |||
*[[DosOpen2]] for adding EAs to new or existing files | |||
*[[DosMkDir2]] for adding EAs to new directories | |||
*[[DosQFileInfo]], [[DosQPathInfo]] to read EAs | |||
*[[DosFindFirst]], [[DosFindNext]] to search for files with specific EAs | |||
==Standard Extended Attributes== | |||
{|class="wikitable" align=right | |||
|+Predefined file types | |||
| | |||
Assembler Code | |||
BASIC Code | |||
Binary Data | |||
Bitmap | |||
C Code | |||
COBOL Code | |||
DOS Command File | |||
Dynamic Link Library | |||
Executable | |||
FORTRAN Code | |||
Icon | |||
Library | |||
Metafile | |||
Pascal Code | |||
Plain Text | |||
Resource File | |||
|} | |||
;.TYPE:type of files (ASCII) | |||
;.KEYPHRASES:text key phrases (ASCII) | |||
;.SUBJECT:brief summary of content (ASCII single-value) | |||
;.COMMENTS:Notes (multi-value) | |||
;.HISTORY:file modification (ASCII) | |||
;.VERSION:version number (ASCII or binary) | |||
;.ICON:binary icon data | |||
;.ASSOCTABLE:association | |||
;.HPFSNAME:long name | |||
==Usage== | |||
;REXX interpreter | |||
REXX.METACONTROL | |||
REXX.PROGRAMDATA | |||
;System Editor | |||
.TYPE | |||
;Multimedia Presentation Manager/2 | |||
.MMPREF_MMAUDIO | |||
.MMPREF_MMIMAGE | |||
.POSTER | |||
;Workplace Shell | |||
.CLASSINFO | |||
.ICON | |||
.ICONPOS | |||
.LONGNAME | |||
.TYPE | |||
==Articles== | ==Articles== | ||
*[[Extended Attributes - what are they and how can you use them ?]] | *Roger Orr: [[Extended Attributes - what are they and how can you use them ?]] - (May 1993) | ||
*Björn Fahller: Encapsulating Extended Attributes [[Encapsulating Extended Attributes - Part 1/2|Part 1]] (May 1996), [[Encapsulating Extended Attributes - Part 2/2|Part 2]] (Jun 1996) | |||
==Links== | |||
*[http://www.tavi.co.uk/os2pages/eadata.html Implementation of extended attributes on the FAT file system] (Bob Eager) | |||
[[Category: | [[Category:File system]] | ||
Latest revision as of 02:48, 7 November 2019
Extended Attributes (EA) are a property of directories as well as of files.
Implementation depends on underlying file systems.
Functions
- DosOpen2 for adding EAs to new or existing files
- DosMkDir2 for adding EAs to new directories
- DosQFileInfo, DosQPathInfo to read EAs
- DosFindFirst, DosFindNext to search for files with specific EAs
Standard Extended Attributes
Assembler Code BASIC Code Binary Data Bitmap C Code COBOL Code DOS Command File Dynamic Link Library Executable FORTRAN Code Icon Library Metafile Pascal Code Plain Text Resource File |
- .TYPE
- type of files (ASCII)
- .KEYPHRASES
- text key phrases (ASCII)
- .SUBJECT
- brief summary of content (ASCII single-value)
- .COMMENTS
- Notes (multi-value)
- .HISTORY
- file modification (ASCII)
- .VERSION
- version number (ASCII or binary)
- .ICON
- binary icon data
- .ASSOCTABLE
- association
- .HPFSNAME
- long name
Usage
- REXX interpreter
REXX.METACONTROL REXX.PROGRAMDATA
- System Editor
.TYPE
- Multimedia Presentation Manager/2
.MMPREF_MMAUDIO .MMPREF_MMIMAGE .POSTER
- Workplace Shell
.CLASSINFO .ICON .ICONPOS .LONGNAME .TYPE
Articles
- Roger Orr: Extended Attributes - what are they and how can you use them ? - (May 1993)
- Björn Fahller: Encapsulating Extended Attributes Part 1 (May 1996), Part 2 (Jun 1996)