Affects Version/s: None
Fix Version/s: None
I recently started to analyze randomly govdocs1 files that could not be recognized by TIKA properly.
This ticket should be used to identify problems with old or proprietary files and to extend TIKA step-by-step if needed.
Stumbled across the following filetypes/files:
1. Old PowerPoint files (I expect Version 2.0 or 3.0) are not recognized properly:
Found some mysterious files starting with 0xeddead0b and 0x0baddeed
Turned out that someone else already investigated this case a month ago:
The files are old PowerPoint. (PowerPoint 3.0 or 2.0)
I think these Magic-strings should be added tika-mimetypes.xml as well as another PowerPoint mime-type. (maybe application/vnd.ms-powerpoint.2 or application/vnd.ms-powerpoint.3 ?)
Example files in govdocs1:
2. Proprietary File Format: SigmaPlot Exchange File .jxf:
Example file in govdocs1:
3. There are two old excel file types which are not recognized at the Moment (application/vnd.ms-excel.sheet.2):
376/376222.unk and 622/62252.unk start with 0x0900040007001000 instead of 0x0900040000001000
224/224485.unk and 615/615187.unk start with 0x0900040002001000 instead of 0x0900040000001000
The magic for application/vnd.ms-excel.sheet.2 should be adapted:
must be added.
Furthermore we have to check whether the parser can be adapted to process all the mentioned files.
(LibreOffice can open all of these files)
4. 128-byte header in front of files
There are several files in the corpus that start with a 128-byte long header in front of the actual file.
The header contains the filename and a specific filetype (TEXTXCEL for 4.1 and SLD3PPT3 for 4.2)
4.1 In file 611/611703.unk I found a 128-byte long header in front of the excel file. (application/vnd.ms-excel.sheet.3)
therefore the file could not be recognized correclty by TIKA
After I cut the header, the file could be recognized and converted by TIKA.
4.2 The following files are old PowerPoint files with a leading 128-byte header
5. SAS Data file
6. AirSar Data (Airborne synthetic aperature Radar)
348/349489.unk (several more...)
7. Advanced Data Format (ADF)
Used in CGNS (CFD General Notation System .cgns)
8. Unknown (old?) Microsoft Word Document
(Recognized as Microsoft Word Document by Linux Magic)
9. Raw weather data by nws noaa
SXXX.. KWAL ...
11. Old OCLC Bibliotheca files
Bibliography files containing books, prints, songs, ...
Let me know if I should open a separate ticket for case 1. and 3.!
If there is any better place (except the mailing lists) to publish the analyzation results let me know.