Delicious User-Item Bipartite Network
The user-URL network of the social bookmarking service Delicious, as the Koblenz Network Collection (KONECT) distributes it as delicious-ui: 301,186,579 timestamped edges between 833,081 user nodes and 33,778,221 url nodes, each recording that a user tagged a URL, timed from 31 August 2003 to 30 December 2007. KONECT notes the network is incomplete (meta tag #incomplete).
Cite this dataset at
delicious-user-item.echo.directory
Analytics
The full graph has 34,611,302 nodes; this view shows the 1,000-node sample the pipeline drew for display. Node size is centrality, colour is community.
Computed over the full corpus. Degree assortativity: exact — networkx's degree assortativity (Pearson correlation of the degrees at the two ends of every edge; directed: out-degree of the source against in-degree of the target), computed with DuckDB Bridge bottleneck count: exact — biconnected components of the undirected graph (NetworKit) Connected components: exact — connected components (NetworKit) Density: exact Reciprocity rate: exact (DuckDB) Top 10 centrality hubs: exact — full degree count (DuckDB)
Record
- Catalog key
delicious-ui- Authors
- Wetzker, Robert; Zimmermann, Carsten; Bauckhage, Christian
- Year
- 2008
- Source paper
- Analyzing social bookmarking systems: A del.icio.us cookbook
- License
- CC BY-SA 2.0 Germany (as stated by KONECT) (LicenseRef-CC-BY-SA-2.0-DE)
- Records
- 34,611,302
- Nodes
- 34,611,302
- Edges
- 101,798,957
- Nodes are
- user / item
- Edges are
- bookmark
- Attributes
- nodes have attributes; edges have attributes
- Languages
- en
- Collected
- 2011 (2010s)
- Tasks
- Recommendation (ranking) inferred
From the graph: link prediction, community detection - Region
- Global (inferred: the platform is used worldwide)
Provenance
- Originally published at
- https://konect.cc/networks/delicious-ui/ unverified
- Original files as received
- The source files, unconverted, kept for reference: mirrored on echo.directory on 2026-10-02, 1.6 GB across 1 files. Checksums in MANIFEST.json. For use, start with the data package below.
- Data package
- Version 1.0.0 of this dataset as an ECHO Data Package: edges (301,186,579 rows), nodes (34,611,302 rows).
- Structure
- Bipartite network, Multigraph (repeated links), Temporal (timestamped), Node attributes
How to cite
BibTeX
@misc{echo2026,
title = {ECHO: Exploratory Compendium of Humanity Online},
author = {Switzer, Braden and Zafarani, Reza},
year = {2026},
url = {https://echo.directory},
note = {Syracuse University}
}
@misc{wetzker2008,
title = {Analyzing social bookmarking systems: A del.icio.us cookbook},
author = {Wetzker, Robert and Zimmermann, Carsten and Bauckhage, Christian},
year = {2008},
note = {In Proc. Mining Soc. Data Workshop, pages 26–30, 2008.}
} APA
Switzer, B., & Zafarani, R. (2026). ECHO: Exploratory Compendium of Humanity Online [Data repository]. Syracuse University. https://echo.directory
Wetzker, R., Zimmermann, C., & Bauckhage, C. (2008). Delicious User-Item Bipartite Network [Data set]. https://delicious-user-item.echo.directory/
MLA
Switzer, Braden, and Reza Zafarani. ECHO: Exploratory Compendium of Humanity Online. Syracuse University, 2026, echo.directory.
Wetzker, Robert, et al. Delicious User-Item Bipartite Network. 2008, delicious-user-item.echo.directory/.