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Ref collection indexes

October 27th, 2004 at 1:06 pm (3 years, 9 months ago) by Andi Vajda under chandlerdb

As said in an earlier post, ref collections are implemented as a double-linked list of bi-directional item references. Ref collection indexes enhance ref collections by enabling positional access into them.

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Item hook methods

October 27th, 2004 at 12:19 pm (3 years, 9 months ago) by Andi Vajda under chandlerdb

The constructor on an Item instance is only invoked the first time the instance is created. It is not invoked as the item is re-instantiated when loaded from the repository.

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Dynamic kind changes, mixins, item stamping

October 27th, 2004 at 11:28 am (3 years, 9 months ago) by Andi Vajda under chandlerdb

In order to support Item Stamping, the data model had to be enhanced to support changing an item’s kind on the fly. Read the rest of this entry »


Item clouds for semantic item aggregrations

October 26th, 2004 at 6:49 pm (3 years, 9 months ago) by Andi Vajda under chandlerdb

Item clouds are a way of semantically grouping together items of different kinds not otherwise stored together in a ref collection or otherwise. For example, the constitutive parts of an email in Chandler are items of various kinds such as the headers, the body, the attachments etc… Read the rest of this entry »


Sources of repository documentation

October 26th, 2004 at 5:59 pm (3 years, 9 months ago) by Andi Vajda under chandlerdb

As with the rest of Chandler, its repository is a work in progress. This is reflected in the state of the various documents pertaining to it. This post attempts to list the known and maintained sources of repository documentation.

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Ref collection aliases

October 26th, 2004 at 4:50 pm (3 years, 9 months ago) by Andi Vajda under chandlerdb

Ref collections, double-linked lists of bi-directional item references, are backed by a hashtable keyed on the referenced items UUIDs. Ref collections - designed with scalability in mind - are sparsely loaded into memory on an as-needed basis. Read the rest of this entry »


More on PyLucene

October 26th, 2004 at 1:48 pm (3 years, 9 months ago) by Andi Vajda under chandlerdb

The PyLucene project was announced on June 24th. It started with version 0.5 to illustrate that it was sort of half-way there; half-way to supporting the entire Lucene set of APIs and capabilities.

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redirectTo: how far to go with it ?

October 20th, 2004 at 1:10 pm (3 years, 9 months ago) by Andi Vajda under chandlerdb

‘redirectTo’ is an attribute aspect that redirects all value and other aspect accesses on an attribute to another one.

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Time to revive this blog ?

October 20th, 2004 at 10:10 am (3 years, 9 months ago) by Andi Vajda under chandlerdb

It’s been 4 months since I’ve posted anything here. During this time, the repository has undergone a lot of changes I should post about.

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Comments on Jeffrey’s Import Export Landscape

July 6th, 2004 at 3:07 am (4 years ago) by Andi Vajda under chandlerdb

Recently, Jeffrey Harris wrote a paper on the Import Export Landscape and asked me to comment on it.

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