Askemos 2000 (Archive)
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Distributed Authoring Extension to HTTP, RFC 2518

This RFC defines extensions to support some aspects of authoring workflow (like locking and version control). Users might be interested to control Askemos agents using the WebDAV protocol from client software which is readily available (see below).

Starting with version 0.7.3 the HTTP-ProtocolAdaptor of BALL has been extended to accept WebDAV requests.

A Word of Warning

WebDAV has several and severe shortcomings: It has been designed under the narrow assumption of document organization in directed, acyclic graphs (tree). These assumptions incure consequencess, which are eventually at least questionable. Therefore we recommend to consider better alternatives for newly developed client software.

Problems with WebDAV

WebDAV distinguishes only two kinds of agents: leaves resources (aka "documents") and intermediate tree nodes (aka collections, directories). Thereby it makes heavy restrictions on the inner workings of collections and documents.

Default Depth is infinity, who did that?

WebDAV protocol parameters seem arbitrarily assigned to HTTP headers and -attributes or ~values. The XML-DTD? violates well known design rules.

This standard is exceptionally hard to read, though the simple matter doesn't give a reason for this hardship.


The mentioned restrictions make WebDAV unsuitable for implementation at BALL kernel level and should be left to the agents themself.

The implementation could use some cleanup and the current plan is to implement only those functions which are actually required for a certain purpose. (See below).

The Wiki-agent (see HowToEditThisPage) has to guess which parts of the document is sensitive text, edited by the user and what is constant decoration (forms, author, date etc). If this guess failes alltogether your saved text will include all the decoration.

WebDAV client software

A command line client similar to the well known ftp program:
mount dav resources under linux as file system in user space (fuse) ((original from -- you better use my modified version, which is still buggy but will not lock up as frequently.

Supported Operations

The Wiki Agent (HowToEditThisPage) has been extended to work with WebDAV. You can save pages from your WebDAV enabled software.


Open page like this

$ openoffice

Use the normal save button to update the network. (In case of trouble see OOo.)


$ cadaver


Related Links

Atom, an alternative which runs on application level rather than server level. Maybe that one fits better for our implementation?

CalDAV? calendar extensions to WebDAV (I hardly understand why those extennsions are required)

last modification: Tue, 12 Oct 2010 22:02:16 +0200
authors: jfw,
document identifier: A849640f672ed0df0958abc0712110f3c
delivered to public at Fri, 19 Apr 2019 13:28:28 +0100
short comments


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24 Apr 2004 DefineInsecureMode
12 Dez 2010 FreeBSD
07 Dez 2010 BALLFeatures
05 Dez 2010 ByzantineAgreement
04 Dez 2010 SQLITE
03 Dez 2010 SRS
12 Okt 2010 WebDAV
12 Sep 2010 SQL
16 Jun 2010 BALL
16 Jun 2010 CouchDB
16 Jun 2010 AskemosServer
07 Mai 2010 SystemRequirements
30 Mar 2010 ProjectsOnThePlate
30 Mar 2010 AskemosResources
30 Mar 2010 RSchemeInstall
30 Mar 2010 INSTALL
30 Mar 2010 ChickenScheme
27 Nov 2009 subscriber
12 Jul 2009 test
01 Jul 2009 TrustCenter
27 Dez 2008 JKomG
26 Dez 2008 FanOut
26 Dez 2008 MIME
02 Mai 2006 AskemosTopMenu
18 Nov 2008 StorageAdaptor
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18 Nov 2008 OperationTips
15 Nov 2008 PCRE
04 Nov 2008 ProgrammingLanguag
09 Sep 2008 RelatedProjects
23 Jul 2008 ModuleStructure05
17 Jun 2008 NEWS
17 Jun 2008 HTML
17 Jun 2008 ACM
22 Mai 2008 HTTP
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10 Mai 2008 AskemosBibliograph
10 Mai 2008 JerrysDreamAbstrac
20 Apr 2008 XSLT
11 Mar 2008 CodingStyle
10 Mar 2008
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07 Mar 2008 XML
06 Mar 2008 SRFI
01 Mar 2008 RFC4810


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