This document discusses web archiving in the Czech Republic. It provides information on who archives the web, how it is archived, and why archiving the web is important. The National Library of the Czech Republic leads web archiving efforts and works with international partners like the International Internet Preservation Consortium to archive over 200 TB of web data using software like Heritrix and OpenWayback. Metadata standards like WARC and CDX are used to describe archived web pages and their relationships over time.

1. Webarchiv
Památník českého internetu, více
OpenAlt 2016
Mezi snem a realitou.
Otevřená data českého webového archivu.
http://www.slideshare.net/webarchivCZ/presentations

2. Proč archivujeme web?
Kdo a jak archivuje web?
Metadata
Rudolf.Kreibich@nkp.cz
vedoucí podpory aplikací NK ČR

3. Proč archivujeme web?

5. “… více jak 70% URL v Harvard Law
Review a 50% URL v nálezích nejvyššího
soudu Spojených států amerických, odkazuje
k již neexistujícímu webovému zdroji. “
Perma: Scoping and Addressing the Problem of Link and Reference Rot in Legal Citations. Jonathan Zittrain,
Kendra Albert a Lawrence Lessig. Legal Information Management / Volume 14 / Issue 02 / June 2014, pp 88-99,
DOI: http://dx.doi.org/10.1017/S1472669614000255, Published online: 12 June 2014

7. 404 Not Found
The 404 (Not Found) status code indicates that the origin server did
not find a current representation for the target resource or is not
willing to disclose that one exists. A 404 status code does not
indicate whether this lack of representation is temporary or
permanent; the 410 (Gone) status code is preferred over 404 if the
origin server knows, presumably through some configurable means, that
the condition is likely to be permanent.
A 404 response is cacheable by default; i.e., unless otherwise
indicated by the method definition or explicit cache controls (see
Section 4.2.2 of [RFC7234]).

8. ✝
uri

9. “Je snažší nalézt exemplář filmu z roku
1924, než webové stránky z roku 1994.”
M.S. Ankerson. “Writing web histories with an eye on the analog past.” 2012.
http://nms.sagepub.com/content/14/3/384.full.pdf+html

10. “Bude možné studovat naše století bez
webových archivů?”
Ian Milligan, Professor in the Department of History at the University of Waterloo.

11. Kdo a jak archivuje web?

13. “Univerzální dostupnost veškerého vědění.”
Brewster Kahle

18. IIPC | Internationl Internet Preservation Consortium
Složení členů
2x Regionální knihovny
32x Národní knihovny (včetně ČR)
3x Neziskové organizace
9x Výzkumné organizace nebo univerzity
http://netpreserve.org/about-us/members

19. Heritrix / OpenWayback
sklízení / zpřístupnění
Otevřený software
Mezinárodní komunita
https://github.com/iipc/openwayback
https://github.com/internetarchive/heritrix3

21. Temný věk Java Scriptu
“Brozzler is a distributed web crawler
(爬⾍) that uses a real browser (chrome
or chromium) to fetch pages and
embedded urls and to extract links.”
https://github.com/internetarchive/brozzler

22. Heritrix sklízí 2065 URL/s
PhantomJS sklízí 172 URL/s
=>
škálovat JS intepretory

25. Měsíční výběrové sklizně
Občasné tématické sklizně
Půl roční sklizně domény cz
(spolupráce s nic.cz)

26. … od roku 2001
~ 221 TB
~ 6 miliard digitálních objektů / URL
~1,2 miliónu domén .cz

28. méně než 1 % je volně přístupné
=
~ 4738 webů z 1,2 miliónu webů

31. Operation | postupný přesun do Infrastructre as Code
Dobrá strana síly
Ansible
Vagrant
Packer
Docker?
…
Temná a svůdná strana
VMware vCenter
IBM GPFS

32. http://arquivo.pt/search.jsp?l=en&query=prase

34. “The Common Crawl corpus contains petabytes of data collected
over the last 7 years.
It contains raw web page data, extracted metadata and text
extractions.
The Common Crawl dataset lives on Amazon S3 as part of the
Amazon Public Datasets program.
From Public Data Sets, you can download the files entirely free using
HTTP or S3.
As the Common Crawl Foundation has evolved over the years, so has
the format and metadata that accompany the crawls themselves.”
http://commoncrawl.org/the-data/get-started/

36. “Google podle mně nearchivuje, ale
cachuje.”
já, u vícero příležitostí

37. metadata

38. WARC | ISO 28500:2009 | Prochází revizí
WARC/1.0
WARC-Type: response
WARC-Date: 2014-08-02T09:52:13Z
WARC-Record-ID:
Content-Length: 43428
Content-Type: application/http; msgtype=response
WARC-Warcinfo-ID:
WARC-Concurrent-To:
WARC-IP-Address: 212.58.244.61
WARC-Target-URI: http://news.bbc.co.uk/2/hi/africa/3414345.stm
WARC-Payload-Digest:
sha1:M63W6MNGFDWXDSLTHF7GWUPCJUH4JK3J
WARC-Block-Digest:
sha1:YHKQUSBOS4CLYFEKQDVGJ457OAPD6IJO
WARC-Truncated: length

39. Wayback CDX Server API
plain text or JSON array of the CDX data
urlkey: org,archive
timestamp: 19970126045828
original: http://www.archive.org:80
mimetype: text/html
statuscode: 200
digest: Q4YULN754FHV2U6Q5JUT6Q2P57WEWNNY
length: 1415
https://github.com/internetarchive/wayback/blob/master/wayback-
cdx-server/README.md

40. WAT | Metadata k archivovaným objektům | JSON
WARC-Header-Metadata:
WARC-Target-URI: http://news.bbc.co.uk/2/hi/africa/3414345.stm
WARC-Type: response
WARC-Date 2014-08-02T09:52:13Z
…
Payload-Metadata:
HTTP-Response-Metadata:
Headers:
Content-Language:
Content-Encoding:
...
HTML-Metadata:
Head:
Title: BBC NEWS | Africa | Namibia braces for Nujoma exit
…
Metas:
name: keywords
content: BBC, News, BBC News, news online, world, uk, international, foreign, british, online, service
…
Links:
href: /css/screen/shared/styles.css
path: STYLE/#text
…
http://commoncrawl.org/the-data/get-started/
https://gist.github.com/Smerity/e750f0ef0ab9aa366558#file-bbc-pretty-wat
https://webarchive.jira.com/wiki/display/Iresearch/archive-metadata-extractor.jar

41. WAT | Metadata k archivovaným objektům | JSON
Server response
"Headers" : {
"Date" : "Sat, 02 Aug 2014 09:52:13 GMT",
"Cache-Control" : "max-age=0",
"Connection" : "close",
"Expires" : "Sat, 02 Aug 2014 09:52:13 GMT",
"Content-Type" : "text/html",
"Server" : "Apache",
"Vary" : "X-CDN",
"Set-Cookie" :
“BBC UID=15730d9c1b741c0d3942e2aca1317fbf39e57b90be68a329d375ba9d5
a8964080CCBot%2f2%2e0%20%28http%3a%2f%2fcommoncrawl%2eorg%2ffaq
%2f%29; expires=Sun, 02-Aug-15 09:52:13 GMT; path=/; domain=bbc.co.uk;"
http://commoncrawl.org/the-data/get-started/
https://gist.github.com/Smerity/e750f0ef0ab9aa366558#file-bbc-pretty-wat
https://webarchive.jira.com/wiki/display/Iresearch/archive-metadata-extractor.jar

42. WET | Extrahovaný fulltext
WARC/1.0
WARC-Type: conversion
WARC-Target-URI: http://news.bbc.co.uk/2/hi/africa/3414345.stm
WARC-Date: 2014-08-02T09:52:13Z
WARC-Record-ID: <urn:uuid:007d632a-ab5a-4c4e-afc2-c455066a82de>
WARC-Refers-To: <urn:uuid:ffbfb0c0-6456-42b0-af03-3867be6fc09f>
WARC-Block-Digest: sha1:JROHLCS5SKMBR6XY46WXREW7RXM64EJC
Content-Type: text/plain
Content-Length: 6724
BBC NEWS | Africa | Namibia braces for Nujoma exit
[an error occurred while processing this directive]
…
Your news when you want it
News Front Page
Africa
…
HausaPortuguese Africa More Last Updated: Thursday, 22 January, 2004, 00:48 GMT
E-mail this to a friend
Printable version
…
Swapo has been careful to secure the Ovambo vote by ploughing a large slice of development funding into the region,
and the people there get more than their fair share of government positions.
For the moment, Mr Nujoma's biggest headache is land reform. Huge tracks of land are still owned by a few white
farmers and black Namibians are impatient at the slow pace of reform. White farmers say they are falling over
backwards to please the government, but Mr Pahamba says that they are only handing over poor quality land.
Meanwhile, the militant black farmer's union is threatening farm occupations similar to those in Zimbabwe. Guard dogs
…
http://commoncrawl.org/the-data/get-started/
https://gist.github.com/Smerity/e750f0ef0ab9aa366558#file-bbc-pretty-wat

43. LGA | Metadata pro vztahy mezi URL v čase
ID-Map
url: https://www.youtube.com/watch?v=--FDzShdFjw&gl=US&hl=en
surt_url: com,youtube)/watch?gl=us&hl=en&v=–fdzshdfjw
id: 294869
příklad
{"url":"https://www.youtube.com/watch?v=--
FDzShdFjw&gl=US&hl=en","surt_url":"com,youtube)/watch?gl=us&hl=en&v=–
fdzshdfjw","id":294869}
ID-Graph
timestamp: 20150209052911
id: 20150209052911
outilink_ids: 31, 31366, 62596, 91594, 91595, …
příklad
{“timestamp":"20150209052911","id":294869,"outlink_ids":
[31,31366,62596,91594,91595,129599, …]}
https://webarchive.jira.com/wiki/display/ARS/LGA+Overview+and+Technical+Details

44. WANE | Extrahované jmenné entity
url: http://dissonantwinstonsmith.wordpress.com/2014/08/24/im-sick-of/?
like_comment=79&_wpnonce=0fc57aa499&replytocom=93
timestamp: 20141019212346
named_entities:
locations: North County, America, St. Louis County St. Louis County
Police St. Louis County, WordPress.com, Middle East, …
organizations: Twitter Facebook Google, Google, Facebook, Wal-Mart,
CNN, Bearcats, …
persons: Stell, Tom Jackson, Smith, Pamela Fillingim, Darren Wilson
Eric Fowler Eric Vickers Ferguson Ferguson, Ferguson, …
digest: sha1:747IKFWUCVQVXY7TX2NMYFL422T4TRQX
Extrahováno se Stanford Named Entity Recognizer (NER)
http://nlp.stanford.edu/software/CRF-NER.shtml
https://webarchive.jira.com/wiki/display/ARS/
WANE+Overview+and+Technical+Details

45. NameTag / CNES 2.0 | WANE?
http://ufal.mff.cuni.cz/nametag
https://ufal.mff.cuni.cz/cnec/cnec2.0

47. Open nsfw model
“This repo contains code for running Not Suitable for Work
(NSFW) classification deep neural network Caffe models. “
https://github.com/yahoo/open_nsfw/blob/master/

49. audio2text

50. NameTag / CNES 2.0 | WANE?
http://ufal.mff.cuni.cz/nametag
https://ufal.mff.cuni.cz/cnec/cnec2.0

53. Jak metadata zpřístupnit?
bulk data
bulk data v S3
API
webová služba

54. Co s metadaty?
vývoj formátů na webu
vývoj prolinkování webů
vývoj nsfw webů na doméně
vývoj poměru grafiky / textu na webu
vývoj web technologií
…

55. Oddělení archivace webu | ODIF | NK ČR
Vedoucí: Jaroslav Kvasnica
Kurátoři: Marie Haškovcová, Monika Holoubková, Markéta
Hrdličková
IT Operation: Rudolf.Kreibich@nkp.cz
webarchiv.cz
facebook.com/webarchivcz
slideshare.net/webarchivCZ
github.com/webarchivcz