ECHOExploratory Compendium of Humanity Online

Stack Exchange — langdev.stackexchange.com

AnalyzedSmallgraphtextStack ExchangeAcademicEngagementKnowledge sharingQ&ASocial graphSoftware development

A Stack Exchange (langdev.stackexchange.com) dataset of 413 users, 1,580 answer-collaboration edges, 728 questions, 2,259 answers, collected by Stack Exchange, Inc. via the annual Stack Exchange Data Dump. Each record contains user nodes (reputation, badge counts, vote history), directed weighted edges (answerer→asker, weight=answer score, count=interactions, accepted=bool), post text, tag distribution. User collaboration network from langdev.stackexchange.com — directed weighted graph where edges represent knowledge-sharing relationships (A answered B's question), with edge weight reflecting answer quality. Enables prestige hierarchy, community detection, and expertise flow analysis.. Suitable for expertise network analysis, reputation systems, community detection, knowledge flow, PageRank-based authority ranking, Q&A platform dynamics..

#Expertise network#Programming language design#Reputation#Stack exchange data dump

Cite this dataset at stackexchange-langdev-stackexchange-com.echo.directory

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Analytics

The interactive network needs JavaScript.

· graph.json

Node size is centrality, colour is community. Hover a node for details; click one to isolate its community.

413
Nodes
1.6K
Edges
9.29e-03
Density
3
Components
-0.2105
Assortativity
8.5%
Reciprocity
156
Bridges
Most central nodes
380.2549
150.1529
50.1529
90.1408
890.1238
80.1141
6160.09709
450.08738
1330.07282
170.07039
Content metrics

2,987 records scored · min–maxmean ± 0.675 σ (the interquartile range if the values are roughly normal)mean

scoreμ 7.342 ± 8.519
min -8max 161
view countμ 269.102 ± 1.4K
min 0max 46.1K
answer countμ 0.757 ± 1.858
min 0max 17
comment countμ 2.675 ± 3.703
min 0max 34
10.9
Flesch–Kincaid grade
US school grade level
12.2
Automated readability index
Frequent terms
quotlanguagetypelikecodelanguagesfunctionuseexampletypescompilervaluedonwayquestionneedsyntaxdifferentfunctionstimecaseintthinkstackstringprogramanswerobjectdoesnreturnwantprogrammingdatapointerrorpythonpossiblerustfoovariableimplementationvalueslistknownewclassmemorythingswritework
Topic clusters

Topic 0

type
function
language
class
like
value
method
object

Topic 1

question
answer
ask
think
thank
close
edit
post

Topic 2

bit
number
float
integer
point
value
precision
arithmetic

Topic 3

token
parser
character
line
comment
indentation
string
parse

Topic 4

stack
pointer
register
memory
function
object
garbage
convention

Topic 5

operator
expression
assignment
boolean
precedence
language
operand
comparison

Topic 6

language
design
question
programming
think
english
use
answer

Topic 7

compiler
code
behavior
program
error
undefined
language
standard
Top hashtags
#define38
#include38
#137
#228
#if12
#lang12
#endif10
#38
#ifdef8
#mul8
#line6
#pragma6
#45
#method5
#v5
#values5
#04
#64
#colorliteral4
#else3

Computed over the full corpus.

Record

Catalog key
stackexchange-langdev-stackexchange-com
Authors
Stack Exchange, Inc.
Year
2025
Source paper
Stack Exchange Data Dump
License
CC BY-SA 2.5 / 3.0 / 4.0 (by post date) (CC-BY-SA-2.5 AND CC-BY-SA-3.0 AND CC-BY-SA-4.0)
Records
12,326
Nodes
413
Edges
1,580 (directed)
Nodes are
user (Stack Exchange account)
Edges are
answer collaboration (A answered B's question)
Attributes
nodes have attributes; edges have attributes
Text corpus
question titles, post bodies, comment text, tag names
Languages
en
Collected
2023/2024 (2020s)
Tasks
From the graph: link prediction, community detection
Region
Global (inferred: the platform is used worldwide)

Provenance

Originally published at
https://archive.org/download/stackexchange link checked
Hosted copy
Mirrored on echo.directory on 2026-10-09, 5.1 MB across 1 files. Checksums in MANIFEST.json.

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{stackexchange_2025,
  title     = {Stack Exchange Data Dump},
  author    = {{Stack Exchange, Inc.}},
  year      = {2025},
  publisher = {Internet Archive},
  url       = {https://archive.org/download/stackexchange}
}

APA

Switzer, B., & Zafarani, R. (2026). ECHO: Exploratory Compendium of Humanity Online [Data repository]. Syracuse University. https://echo.directory

Stack Exchange, Inc. (2025). Stack Exchange — langdev.stackexchange.com [Data set]. https://stackexchange-langdev-stackexchange-com.echo.directory/

MLA

Switzer, Braden, and Reza Zafarani. ECHO: Exploratory Compendium of Humanity Online. Syracuse University, 2026, echo.directory.

Stack Exchange, Inc. Stack Exchange — langdev.stackexchange.com. 2025, stackexchange-langdev-stackexchange-com.echo.directory/.

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