History of dblp_coauthor

The changes to the source code of this entry in the repository, newest first, each with the differences it made to the entry's files. They are also listed on GitLab.

2026-10-25 [entries] Add networks to existing entries by Tiago de Paula Peixoto 3023ce5

- digg_votes: the Digg friendship network (`friends`, next to `votes`)
- facebook_wall: the friendship links (`friends`, next to `wall`)
- interactome_vidal: CCSB's HI-I-05 interactions (`HI-I-05`, next to
  `maayan`)
- trackers: ssc.io's tracker embedding network (`trackers`, next to
  KONECT's `third_parties`), with corrected description and citations
- dblp_author_paper, dblp_cite, dblp_coauthor: the dblp release of
  2026-10-03 (`2026-10`, next to `2017`)
- fullerene_structures: year, licence and description

diff --git a/entries/dblp_coauthor/__init__.py b/entries/dblp_coauthor/__init__.py
index 9c5adbc..3225c26 100644
--- a/entries/dblp_coauthor/__init__.py
+++ b/entries/dblp_coauthor/__init__.py
@@ -21,8 +21,8 @@ import array
 import html.entities
 import xml.etree.ElementTree as ET
 
-title = 'DBLP co-authorships (2017)'
-description = r"""Scientific collaborations among authors of publications in the dblp computer science bibliography. The data are from the monthly release of 2 May 2017 of the XML dump of dblp, the computer science bibliography maintained by the University of Trier and Schloss Dagstuhl, which lists publications from journals, conference proceedings, books, theses and the arXiv Computing Research Repository (CoRR). Each record of the dump is a publication of one of the types `article` (journal articles and CoRR preprints), `inproceedings` (conference papers), `proceedings` (edited proceedings volumes), `book`, `incollection` (book chapters), `phdthesis` or `mastersthesis`; the person records (homepages) of the dump are not used. Authors are identified by their dblp name, which dblp disambiguates by hand where it can (homonymous authors are distinguished by a numeric suffix, e.g. "Wei Wang 0001"), but some of which may still refer to several persons. Nodes are authors, and an undirected edge between two authors means that they co-authored a publication; each publication with $k$ authors contributes $k(k-1)/2$ undirected edges, one between each pair of its authors, so that the network is a multigraph, with as many edges between two authors as their joint publications (i.e. it is a projection of the bipartite network of authors and publications). Editors of proceedings volumes are not included, and neither are authors without co-authors.
+title = 'DBLP co-authorships (2017-2026)'
+description = r"""Scientific collaborations among authors of publications in the dblp computer science bibliography. The data are from the XML dump of dblp, the computer science bibliography maintained by the University of Trier and Schloss Dagstuhl, which lists publications from journals, conference proceedings, books, theses and the arXiv Computing Research Repository (CoRR). The collection contains one network for each of two monthly releases of the dump: `2017`, from the release of 2 May 2017, and `2026-10`, from the release of 3 October 2026. Each record of the dump is a publication of one of the types `article` (journal articles and CoRR preprints), `inproceedings` (conference papers), `proceedings` (edited proceedings volumes), `book`, `incollection` (book chapters), `phdthesis` or `mastersthesis`, and, in the release of 2026, also `data` (research data and artifacts); the person records (homepages) of the dump are not used. Authors are identified by their dblp name, which dblp disambiguates by hand where it can (homonymous authors are distinguished by a numeric suffix, e.g. "Wei Wang 0001"), but some of which may still refer to several persons. Nodes are authors, and an undirected edge between two authors means that they co-authored a publication; each publication with $k$ authors contributes $k(k-1)/2$ undirected edges, one between each pair of its authors, so that the network is a multigraph, with as many edges between two authors as their joint publications (i.e. it is a projection of the bipartite network of authors and publications). Editors of proceedings volumes are not included, and neither are authors without co-authors.
 
 The network has the following properties:
 
@@ -30,19 +30,24 @@ The network has the following properties:
 - `year` (edge): the year of the joint publication (-1 if missing).
 - `n_authors` (edge): the number of authors of the joint publication."""
 tags = ['Social', 'Collaboration', 'Unweighted', 'Multigraph', 'Projection', 'Timestamps', 'Metadata']
-url = 'https://dblp.org/xml/release/'
-citation = [('M. Ley, "The DBLP computer science bibliography: Evolution, research issues, perspectives." Proc. of the 9th Int. Symposium on String Processing and Information Retrieval (SPIRE), 1-10 (2002)', 'https://doi.org/10.1007/3-540-45735-6_1')]
+url = ['https://doi.org/10.4230/dblp.xml', 'https://web.archive.org/web/20170612152202/http://dblp.org/xml/release/']
+citation = [('M. Ley, "The DBLP computer science bibliography: Evolution, research issues, perspectives." Proc. of the 9th Int. Symposium on String Processing and Information Retrieval (SPIRE), 1-10 (2002)', 'https://doi.org/10.1007/3-540-45735-6_1'),
+            ('dblp Team, "dblp computer science bibliography – Monthly Snapshot XML Release of October 2026." Schloss Dagstuhl – Leibniz Center for Informatics (2026)', 'https://doi.org/10.4230/dblp.xml.2026-10-03')]
 icon_hash = '57574e51bd3e93b53c69556a'
-upstream_license = ("Open Data Commons Attribution License (ODC-BY 1.0)",
-                    "https://opendatacommons.org/licenses/by/1-0/")
+upstream_license = ("Open Data Commons Attribution License (ODC-BY 1.0) for the release of 2017; Creative Commons Zero (CC0 1.0) for the release of 2026",
+                    "https://creativecommons.org/publicdomain/zero/1.0/")
 # The dblp release of 2017-05-02 (md5 cc92847c789bf2467d085ccf4948422f), which
-# is no longer on dblp.org, from the Internet Archive
+# is no longer on dblp.org, from the Internet Archive, and the release of
+# 2026-10-03 (md5 cbd329100ea1bbb2873fa2f6d414ea00) from DROPS
 upstream_prefix = 'https://web.archive.org/web/20170612152202id_/http://dblp.org/xml/release'
-files = [('dblp-2017-05-02.xml.gz', None, None)]
+drops_prefix = 'https://drops.dagstuhl.de/storage/artifacts/dblp/xml/2026'
+files = [('dblp-2017-05-02.xml.gz', '2017', None),
+         ('dblp-2026-10-03.xml.gz', '2026-10', None)]
 
 def fetch_upstream(force=False):
-    return fetch_upstream_files(__name__.split(".")[-1], upstream_prefix, files,
-                                force)
+    name = __name__.split(".")[-1]
+    fetch_upstream_files(name, upstream_prefix, files[:1], force)
+    fetch_upstream_files(name, drops_prefix, files[1:], force)
 
 class _DBLPTarget:
     """XML parser target that collects the records of the dblp dump (the

2026-10-25 [entries] Move more KONECT-derived entries to their original sources by Tiago de Paula Peixoto bf9dc0e

The entries now download the data from where KONECT obtained them (live,
or via the Wayback Machine), using the same release as KONECT where it is
still available, and gain the metadata KONECT dropped; descriptions and
citations are rewritten from the original sources:

- Linton Freeman's UCINET data page: bible_nouns, bison, cattle, hens,
  highschool, kangaroo, macaques, moreno_sheep, physician_trust (the three
  relations and the physicians' attributes), rhesus_monkey,
  train_terrorists, windsurfers (now the networks `interaction` and
  `closeness`), college_freshmen, crime, interactome_yeast (from the
  primary source), moreno_taro (undirected), residence_hall, zebras
- other pages, archived: contiguous_usa, advogato, google, github,
  digg_reply, twitter, bookcrossing, dbtropes_feature (without KONECT's
  spurious "ItemName" tropes)
- movielens_100k (in fact the MovieLens 10M tag assignments)
- dblp release 2017-05-02: dblp_author_paper, dblp_cite, dblp_coauthor
- DBpedia 3.9: dbpedia_country, dbpedia_genre, dbpedia_location,
  dbpedia_occupation, dbpedia_producer, dbpedia_recordlabel,
  dbpedia_starring, dbpedia_team, dbpedia_writer, dbpedia_all, dbpedia_link
- Discogs releases dump of October 2015: discogs_affiliation,
  discogs_genre and discogs_label (now with genre and style networks)

diff --git a/entries/dblp_coauthor/__init__.py b/entries/dblp_coauthor/__init__.py
index 653b127..9c5adbc 100644
--- a/entries/dblp_coauthor/__init__.py
+++ b/entries/dblp_coauthor/__init__.py
@@ -17,33 +17,136 @@
 # with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from .. import *
+import array
+import html.entities
+import xml.etree.ElementTree as ET
 
-title = "DBLP authors (2016)"
-description = """Scientific collaborations among authors of papers in the DBLP computer science bibliographic database. If an author i co-authored a paper with author j, the graph contains a undirected edge from i to j. If the paper is co-authored by k authors this generates a completely connected (sub)graph on k nodes (hence, this is a projection from a bipartite graph of authors and their publications). The date of this snapshot is uncertain.[^icon]
-[^icon]: Description obtained from the [ICON](https://icon.colorado.edu) project."""
-tags = ['Social', 'Collaboration', 'Unweighted', 'Multigraph', 'Projection']
-url = 'http://konect.cc/networks/dblp_coauthor'
+title = 'DBLP co-authorships (2017)'
+description = r"""Scientific collaborations among authors of publications in the dblp computer science bibliography. The data are from the monthly release of 2 May 2017 of the XML dump of dblp, the computer science bibliography maintained by the University of Trier and Schloss Dagstuhl, which lists publications from journals, conference proceedings, books, theses and the arXiv Computing Research Repository (CoRR). Each record of the dump is a publication of one of the types `article` (journal articles and CoRR preprints), `inproceedings` (conference papers), `proceedings` (edited proceedings volumes), `book`, `incollection` (book chapters), `phdthesis` or `mastersthesis`; the person records (homepages) of the dump are not used. Authors are identified by their dblp name, which dblp disambiguates by hand where it can (homonymous authors are distinguished by a numeric suffix, e.g. "Wei Wang 0001"), but some of which may still refer to several persons. Nodes are authors, and an undirected edge between two authors means that they co-authored a publication; each publication with $k$ authors contributes $k(k-1)/2$ undirected edges, one between each pair of its authors, so that the network is a multigraph, with as many edges between two authors as their joint publications (i.e. it is a projection of the bipartite network of authors and publications). Editors of proceedings volumes are not included, and neither are authors without co-authors.
+
+The network has the following properties:
+
+- `name`: the name of the author.
+- `year` (edge): the year of the joint publication (-1 if missing).
+- `n_authors` (edge): the number of authors of the joint publication."""
+tags = ['Social', 'Collaboration', 'Unweighted', 'Multigraph', 'Projection', 'Timestamps', 'Metadata']
+url = 'https://dblp.org/xml/release/'
 citation = [('M. Ley, "The DBLP computer science bibliography: Evolution, research issues, perspectives." Proc. of the 9th Int. Symposium on String Processing and Information Retrieval (SPIRE), 1-10 (2002)', 'https://doi.org/10.1007/3-540-45735-6_1')]
 icon_hash = '57574e51bd3e93b53c69556a'
-upstream_prefix = 'http://konect.cc/files'
-files = [('download.tsv.dblp_coauthor.tar.bz2', None, 'konect')]
+upstream_license = ("Open Data Commons Attribution License (ODC-BY 1.0)",
+                    "https://opendatacommons.org/licenses/by/1-0/")
+# The dblp release of 2017-05-02 (md5 cc92847c789bf2467d085ccf4948422f), which
+# is no longer on dblp.org, from the Internet Archive
+upstream_prefix = 'https://web.archive.org/web/20170612152202id_/http://dblp.org/xml/release'
+files = [('dblp-2017-05-02.xml.gz', None, None)]
 
 def fetch_upstream(force=False):
     return fetch_upstream_files(__name__.split(".")[-1], upstream_prefix, files,
                                 force)
 
+class _DBLPTarget:
+    """XML parser target that collects the records of the dblp dump (the
+    children of the root element), as dicts with the record type, the key,
+    and the lists of the texts of the given fields."""
+    def __init__(self, fields):
+        self.fields = fields
+        self.depth = 0
+        self.records = []
+        self.rec = None
+        self.buf = None
+    def start(self, tag, attrib):
+        self.depth += 1
+        if self.depth == 2:
+            self.rec = {"type": tag, "key": attrib.get("key", "")}
+        elif self.depth == 3 and tag in self.fields:
+            self.buf = []
+    def data(self, text):
+        if self.buf is not None:
+            self.buf.append(text)
+    def end(self, tag):
+        if self.depth == 3 and self.buf is not None:
+            self.rec.setdefault(tag, []).append("".join(self.buf).strip())
+            self.buf = None
+        elif self.depth == 2:
+            self.records.append(self.rec)
+            self.rec = None
+        self.depth -= 1
+    def close(self):
+        pass
+
+def read_dblp(f, fields, skip_www=True):
+    """Iterate over the records of the dblp XML dump, read in a streaming
+    fashion. The records of type "www" (mostly person records) are skipped if
+    skip_www is True."""
+    target = _DBLPTarget(set(fields))
+    parser = ET.XMLParser(target=target)
+    # The character entities are defined in the DTD, which is not read
+    parser.entity.update((k, chr(v)) for k, v in
+                         html.entities.name2codepoint.items())
+    while True:
+        chunk = f.read(1 << 22)
+        if chunk:
+            parser.feed(chunk)
+        else:
+            parser.close()
+        recs, target.records = target.records, []
+        for r in recs:
+            if not skip_www or r["type"] != "www":
+                yield r
+        if not chunk:
+            break
+
+def _year(r):
+    try:
+        return int(r["year"][0])
+    except (KeyError, ValueError):
+        return -1
+
+def _venue(r):
+    return (r.get("journal") or r.get("booktitle") or [""])[0]
+
+def _set_pub_props(g, v, r):
+    g.vp.title[v] = (r.get("title") or [""])[0]
+    g.vp.year[v] = _year(r)
+    g.vp.type[v] = r["type"]
+    g.vp.venue[v] = _venue(r)
+
+def _new_pub_props(g):
+    g.vp.title = g.new_vp("string")
+    g.vp.year = g.new_vp("int", val=-1)
+    g.vp.type = g.new_vp("string")
+    g.vp.venue = g.new_vp("string")
+
 @cache_network()
 @coerce_props()
 @annotate()
 def parse(alts=None):
     global files
     name = __name__.split(".")[-1]
-    for fnames, alt, fmt in files:
+    for fname, alt, fmt in files:
         if alts is not None and alt not in alts:
             continue
-        if isinstance(fnames, str):
-            fnames = [fnames]
-        with ExitStack() as stack:
-            fs = [stack.enter_context(open_upstream_file(name, fn, "rb")) for fn in fnames]
-            g = parse_graph(fs, fmt, directed=False)
+        authors = {}
+        edges = array.array("q")
+        with open_upstream_file(name, fname, "rb") as f:
+            for r in read_dblp(f, ["author", "year"]):
+                # authors listed more than once are counted once
+                a = list(dict.fromkeys(r.get("author", [])))
+                k = len(a)
+                if k < 2:
+                    continue
+                idx = [authors.setdefault(x, len(authors)) for x in a]
+                y = _year(r)
+                for i in range(k):
+                    for j in range(i + 1, k):
+                        edges.extend((idx[i], idx[j], y, k))
+        g = Graph(directed=False)
+        g.add_vertex(len(authors))
+        g.ep.year = g.new_ep("int")
+        g.ep.n_authors = g.new_ep("int")
+        g.add_edge_list(numpy.frombuffer(edges, dtype="int64").reshape(-1, 4),
+                        eprops=[g.ep.year, g.ep.n_authors])
+        del edges
+        g.vp.name = g.new_vp("string", vals=list(authors.keys()))
         yield alt, g
+

2026-10-24 Update copyright information by Tiago de Paula Peixoto 73a4f0d

diff --git a/entries/dblp_coauthor/__init__.py b/entries/dblp_coauthor/__init__.py
index 8049482..653b127 100644
--- a/entries/dblp_coauthor/__init__.py
+++ b/entries/dblp_coauthor/__init__.py
@@ -1,7 +1,7 @@
 #! /usr/bin/env python
 # -*- coding: utf-8 -*-
 #
-# Copyright (C) 2020-2024 Tiago de Paula Peixoto <tiago@skewed.de>
+# Copyright (C) 2020-2026 Tiago de Paula Peixoto <tiago@skewed.de>
 #
 # This program is free software: you can redistribute it and/or modify it under
 # the terms of the GNU Affero General Public License as published by the Free

2024-05-27 Update copyright information by Tiago de Paula Peixoto 3d288ea

diff --git a/entries/dblp_coauthor/__init__.py b/entries/dblp_coauthor/__init__.py
index 7b23e95..8049482 100644
--- a/entries/dblp_coauthor/__init__.py
+++ b/entries/dblp_coauthor/__init__.py
@@ -1,7 +1,7 @@
 #! /usr/bin/env python
 # -*- coding: utf-8 -*-
 #
-# Copyright (C) 2020-2023 Tiago de Paula Peixoto <tiago@skewed.de>
+# Copyright (C) 2020-2024 Tiago de Paula Peixoto <tiago@skewed.de>
 #
 # This program is free software: you can redistribute it and/or modify it under
 # the terms of the GNU Affero General Public License as published by the Free

2023-02-19 Update copyright information by Tiago de Paula Peixoto 8d005ae

diff --git a/entries/dblp_coauthor/__init__.py b/entries/dblp_coauthor/__init__.py
index d8a15d2..7b23e95 100644
--- a/entries/dblp_coauthor/__init__.py
+++ b/entries/dblp_coauthor/__init__.py
@@ -1,7 +1,7 @@
 #! /usr/bin/env python
 # -*- coding: utf-8 -*-
 #
-# Copyright (C) 2021 Tiago de Paula Peixoto <tiago@skewed.de>
+# Copyright (C) 2020-2023 Tiago de Paula Peixoto <tiago@skewed.de>
 #
 # This program is free software: you can redistribute it and/or modify it under
 # the terms of the GNU Affero General Public License as published by the Free

2021-06-22 Update copyright info by Tiago de Paula Peixoto db2efcc

diff --git a/entries/dblp_coauthor/__init__.py b/entries/dblp_coauthor/__init__.py
index 7e0bd62..d8a15d2 100644
--- a/entries/dblp_coauthor/__init__.py
+++ b/entries/dblp_coauthor/__init__.py
@@ -1,7 +1,7 @@
 #! /usr/bin/env python
 # -*- coding: utf-8 -*-
 #
-# Copyright (C) 2020 Tiago de Paula Peixoto <tiago@skewed.de>
+# Copyright (C) 2021 Tiago de Paula Peixoto <tiago@skewed.de>
 #
 # This program is free software: you can redistribute it and/or modify it under
 # the terms of the GNU Affero General Public License as published by the Free

2021-02-01 Un-orphan KONECT datasets by Tiago de Paula Peixoto 894eba5

KONECT has been brought back from the dead for the time being.

diff --git a/entries/dblp_coauthor/__init__.py b/entries/dblp_coauthor/__init__.py
index a866ed0..7e0bd62 100644
--- a/entries/dblp_coauthor/__init__.py
+++ b/entries/dblp_coauthor/__init__.py
@@ -26,7 +26,6 @@ url = 'http://konect.cc/networks/dblp_coauthor'
 citation = [('M. Ley, "The DBLP computer science bibliography: Evolution, research issues, perspectives." Proc. of the 9th Int. Symposium on String Processing and Information Retrieval (SPIRE), 1-10 (2002)', 'https://doi.org/10.1007/3-540-45735-6_1')]
 icon_hash = '57574e51bd3e93b53c69556a'
 upstream_prefix = 'http://konect.cc/files'
-orphan = True
 files = [('download.tsv.dblp_coauthor.tar.bz2', None, 'konect')]
 
 def fetch_upstream(force=False):

2020-11-28 Update citations to use DOIs by Tiago de Paula Peixoto e878874

diff --git a/entries/dblp_coauthor/__init__.py b/entries/dblp_coauthor/__init__.py
index 8e3d24c..a866ed0 100644
--- a/entries/dblp_coauthor/__init__.py
+++ b/entries/dblp_coauthor/__init__.py
@@ -23,7 +23,7 @@ description = """Scientific collaborations among authors of papers in the DBLP c
 [^icon]: Description obtained from the [ICON](https://icon.colorado.edu) project."""
 tags = ['Social', 'Collaboration', 'Unweighted', 'Multigraph', 'Projection']
 url = 'http://konect.cc/networks/dblp_coauthor'
-citation = [('M. Ley, "The DBLP computer science bibliography: Evolution, research issues, perspectives." Proc. of the 9th Int. Symposium on String Processing and Information Retrieval (SPIRE), 1-10 (2002)', 'http://dl.acm.org/citation.cfm?id=694954')]
+citation = [('M. Ley, "The DBLP computer science bibliography: Evolution, research issues, perspectives." Proc. of the 9th Int. Symposium on String Processing and Information Retrieval (SPIRE), 1-10 (2002)', 'https://doi.org/10.1007/3-540-45735-6_1')]
 icon_hash = '57574e51bd3e93b53c69556a'
 upstream_prefix = 'http://konect.cc/files'
 orphan = True

2020-11-02 Add support for 'orphan' datasets and tag konect entries by Tiago de Paula Peixoto e330b80

diff --git a/entries/dblp_coauthor/__init__.py b/entries/dblp_coauthor/__init__.py
index 16caee1..8e3d24c 100644
--- a/entries/dblp_coauthor/__init__.py
+++ b/entries/dblp_coauthor/__init__.py
@@ -26,6 +26,7 @@ url = 'http://konect.cc/networks/dblp_coauthor'
 citation = [('M. Ley, "The DBLP computer science bibliography: Evolution, research issues, perspectives." Proc. of the 9th Int. Symposium on String Processing and Information Retrieval (SPIRE), 1-10 (2002)', 'http://dl.acm.org/citation.cfm?id=694954')]
 icon_hash = '57574e51bd3e93b53c69556a'
 upstream_prefix = 'http://konect.cc/files'
+orphan = True
 files = [('download.tsv.dblp_coauthor.tar.bz2', None, 'konect')]
 
 def fetch_upstream(force=False):

2020-09-15 Change license from GPLv3 to AGPLv3 by Tiago de Paula Peixoto d754be5

diff --git a/entries/dblp_coauthor/__init__.py b/entries/dblp_coauthor/__init__.py
index e9fea80..16caee1 100644
--- a/entries/dblp_coauthor/__init__.py
+++ b/entries/dblp_coauthor/__init__.py
@@ -3,18 +3,18 @@
 #
 # Copyright (C) 2020 Tiago de Paula Peixoto <tiago@skewed.de>
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# This program is free software: you can redistribute it and/or modify it under
+# the terms of the GNU Affero General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option) any
+# later version.
 #
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
+# details.
 #
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# You should have received a copy of the GNU Affero General Public License along
+# with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from .. import *

2020-09-13 Add explicit attribution to descriptions obtained from ICON by Tiago de Paula Peixoto 1645314

diff --git a/entries/dblp_coauthor/__init__.py b/entries/dblp_coauthor/__init__.py
index 541f16a..e9fea80 100644
--- a/entries/dblp_coauthor/__init__.py
+++ b/entries/dblp_coauthor/__init__.py
@@ -19,7 +19,8 @@
 from .. import *
 
 title = "DBLP authors (2016)"
-description = "Scientific collaborations among authors of papers in the DBLP computer science bibliographic database. If an author i co-authored a paper with author j, the graph contains a undirected edge from i to j. If the paper is co-authored by k authors this generates a completely connected (sub)graph on k nodes (hence, this is a projection from a bipartite graph of authors and their publications). The date of this snapshot is uncertain."
+description = """Scientific collaborations among authors of papers in the DBLP computer science bibliographic database. If an author i co-authored a paper with author j, the graph contains a undirected edge from i to j. If the paper is co-authored by k authors this generates a completely connected (sub)graph on k nodes (hence, this is a projection from a bipartite graph of authors and their publications). The date of this snapshot is uncertain.[^icon]
+[^icon]: Description obtained from the [ICON](https://icon.colorado.edu) project."""
 tags = ['Social', 'Collaboration', 'Unweighted', 'Multigraph', 'Projection']
 url = 'http://konect.cc/networks/dblp_coauthor'
 citation = [('M. Ley, "The DBLP computer science bibliography: Evolution, research issues, perspectives." Proc. of the 9th Int. Symposium on String Processing and Information Retrieval (SPIRE), 1-10 (2002)', 'http://dl.acm.org/citation.cfm?id=694954')]

2020-08-11 Initial commit by Tiago de Paula Peixoto cc85872

diff --git a/entries/dblp_coauthor/__init__.py b/entries/dblp_coauthor/__init__.py
new file mode 100644
index 0000000..541f16a
--- /dev/null
+++ b/entries/dblp_coauthor/__init__.py
@@ -0,0 +1,48 @@
+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2020 Tiago de Paula Peixoto <tiago@skewed.de>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from .. import *
+
+title = "DBLP authors (2016)"
+description = "Scientific collaborations among authors of papers in the DBLP computer science bibliographic database. If an author i co-authored a paper with author j, the graph contains a undirected edge from i to j. If the paper is co-authored by k authors this generates a completely connected (sub)graph on k nodes (hence, this is a projection from a bipartite graph of authors and their publications). The date of this snapshot is uncertain."
+tags = ['Social', 'Collaboration', 'Unweighted', 'Multigraph', 'Projection']
+url = 'http://konect.cc/networks/dblp_coauthor'
+citation = [('M. Ley, "The DBLP computer science bibliography: Evolution, research issues, perspectives." Proc. of the 9th Int. Symposium on String Processing and Information Retrieval (SPIRE), 1-10 (2002)', 'http://dl.acm.org/citation.cfm?id=694954')]
+icon_hash = '57574e51bd3e93b53c69556a'
+upstream_prefix = 'http://konect.cc/files'
+files = [('download.tsv.dblp_coauthor.tar.bz2', None, 'konect')]
+
+def fetch_upstream(force=False):
+    return fetch_upstream_files(__name__.split(".")[-1], upstream_prefix, files,
+                                force)
+
+@cache_network()
+@coerce_props()
+@annotate()
+def parse(alts=None):
+    global files
+    name = __name__.split(".")[-1]
+    for fnames, alt, fmt in files:
+        if alts is not None and alt not in alts:
+            continue
+        if isinstance(fnames, str):
+            fnames = [fnames]
+        with ExitStack() as stack:
+            fs = [stack.enter_context(open_upstream_file(name, fn, "rb")) for fn in fnames]
+            g = parse_graph(fs, fmt, directed=False)
+        yield alt, g