SYN2005

The SYN2005 corpus is a synchronic representative corpus of contemporary written Czech, containing 100 million words (tokens). This basic characteristic is identical with its predecessor, the SYN2000 corpus. There are, however, also many differences between these two corpora, which must be taken into consideration when comparing any data in the two corpora (see below), because the mere mechanical comparison of frequencies can lead to misleading conclusions when these circumstances are not known. We also consider it important to emphasise that none of the corpus SYN2005 texts were previously used in the SYN2000 corpus.

The representative character of the SYN2005 corpus is based on a new research of written language reception, therefore, its structure is different in some respects from the SYN2000 corpus. The comparison of both corpora according to main fields are presented in the following chart:

More differences are visible also within the main fields; while the structure of technical literature as to its thematic orientation has only slightly changed, the structure of journalism, on the other hand, has changed considerably. Not only are all the journalistic texts from 2000–2004, and each year has the same representation, but in comparison with the SYN2000 corpus, also the representation of the individual newspapers and magazines has changed - more new titles were added and among them particularly the share of Blesk is important. What has not changed is the synchrony in the other two main fields; in the SYN2005 corpus, we can find technical literature from 1990–2004, the fiction may beeven older. In both cases, however, special attention was paid to making sure that there were as few older texts as possible.

Since June 2006, the SYN2005 corpus has been lemmatised and morphologically tagged. A more advanced version of lemmatisation and morphological tagging wasused for this corpus. The system of morphological tags remains the same, however, and the only novelty is position no. 16 which expresses the verbal aspect.

Also new and improved tokenisation (division of the corpus into words) and segmentation (division into sentences) is connected with the new lemmatisation and morphological tagging of the SYN2005 corpus. For instance, the word česko-polský was divided into three tokens (česko - polský) in SYN2000, while in SYN2005, it is only one token (česko-polský).

The last major change concerns source determining; many users of the SYN2000 corpus justifiably criticised the fact that they had to look for the bibliographic information on our web site under a code. In the SYN2005 corpus, all relevant information about the text (author, name, publisher, year of publishing, etc.) is available through the corpus manager.