LAB4

Data Storage and Preservation involves strategies to keep digital information accessible, usable, and authentic throughout its lifecycle. Key elements include:

• Integrity: Ensuring unchanged bit configuration.

• Authenticity: Maintaining original characteristics.

Main Preservation Strategies:

1. Migration: data are transformed from one technology to another, while at the same time to preserve the significant properties of a digitally resource.

   • Media migration: Transferring data to new storage media.

   • Format migration: Converting to new file formats.

2. Conversion: Updating data to newer versions of the same format.

3. OAIS (Open Archival Information System): Complies with ISO 14721:2012, including functional entities such as ingestion, archival storage, data management, administration, preservation planning, and access.

Best Practices:

• Organize files logically by subject or theme, avoiding deep subdirectories.

• Utilize sustainable file formats: PDF, JPEG, WAV, and AVI.

• Follow consistent file naming conventions that include important details like dates and versions.

Practical Applications: Students can analyze digitization case studies and practice file naming using real-world digital collections.

Folder Structure Guidelines:

- Create logical, systematic organization

- Organize by subject, theme, or author

- Avoid deep subdirectories

- Use clear folder names

- Keep related files together

Sustainable File Formats:

- Text: PDF 1.7, PDF/A, ODF, XML

- Images (raster): JPEG, JP2, TIFF, PNG

- Images (vector): SVG

- Audio: WAV, FLAC, MKA

- Video: AVI, MKV (Codecs: V210, MJ2, FFV1, H.264, H.265)

Avoid compression when possible to prevent quality loss.

File Naming Conventions:

- Use consistent structure (e.g., YYYYMMDD for dates)

- Avoid special characters (?, !, @, *, %, {, [, <, >)

- Use underscore or dash instead of spaces

- Include relevant identifiers:

- Collection name

- Subject

- Object name

- Date

- Version

- Document naming conventions in readme.txt