ARCHE - external wiki

h1. Wiki

This is a public Wiki that collects workflows and information to prepare Data for ingesting and archiving in ARCHE.

Any interested participants are welcome to join (please contact acdh-helpdesk@oeaw.ac.at)

{{toc}}

---

h2. Data Types

h3. Images (raster)

Formats for archiving:

* tiff, tif - baseline TIFF v. 6, uncompressed

* dng (Adobe Digital Negative)

* png (Portable Network Graphics) - only suitable for graphics, does not support EXIF metadata

More on: [[Images]]

h3. Images (vector)

Formats for archiving:

* svg

* (dxf, dwg 2010 (AC1024)) (dxf should be preferred over dwg)

* (pdf/a) (only retains look of image, not layers, elements etc.)

More on: [[Images (vector)]]

h3. PDF files

Formats for archiving:

* pdf/a-1 (a or b)

* pdf/a-2 (a, b, or u)

More on [[PDF files]]

h3. Structured text

Formats for archiving:

* bib

* kml 2.2

* md

* tex

* xml

* --> list will be extended

More on [[Structured text]]

h3. Databases

(TODO)

* https://www.loc.gov/preservation/digital/formats/fdd/fdd000426.shtml

h3. Geospatial Data

Formats for archiving:

* kml 2.2 (see [[Structured text]])

(more to come)

h2. Metadata in files (e.g. EXIF)

Many file formats support storing metadata in a dedicated header section. This can be enriched or altered. 

Tools:

* ExifTool: https://exiftool.org

More on: [[Editing Metadata|Editing File Metadata]]