Previous, the field and nummeric concept was not supported by FreeWais. 
Now it is possible.

The field index method used here is based on a field_description file. 

Was is a field_description file ?
-------------------------------

Most documents do not have an over-all structure, e.g. 

- Title: Information Retrieval, means the field Title.
- Ti: Information Retrieval, means the field Title too.

How can i find out what line means the field Title or Author ?

The field_description file describes how the server does index a file in a
certain format and how the server does create a set of fields. In addition, 
with the field_description file you can determine what length should have 
your headlines.

Structure of field_description file:
------------------------------------
<field> begin_tag
field_to_create_1, field_to_create_n <idx> indextype_1 index_kind, indextype_n index_kind.
<end> end_tag

begin_tag = regular expression

Example:
--------
The document has this format:
---------------------------------------------------------------------
CK: Burghardt/etal:93a                                              |
DT: IP                                                              |
AU: Burghardt, A.; Fuhr, N.; Gro\ss{}johann, K.;  Pfeifer, U.;      |
    Spielmann, H.; Stach, O.                                        |
TI: NOSFERATU --- an Integrated Database Management and Information |
    Retrieval system based on Data Streams (in German)              |
ER: Fuhr, N.                                                        |
BT: Proceedings 1. GI-Fachtagung Information Retrieval              |
PN: Universit\"atsverlag Konstanz                                   |
PA: Konstanz                                                        |
PP: 27-40                                                           |
LA: GE                                                              |
ED: 930104                                                          |
PY: 1993                                                            |
LO: P                                                               |
RD: Fu                                                              |
CC: H.3.3                                                           |
SD: selection process                                               |
FT: stream-oriented                                                 |
---------------------------------------------------------------------

<field> AU:
au names <idx> 

<nfidx> begin_tag
indextype_1, ...., indextype_n.
<end> end_tag

<nidx> begin_tag
<end> end_tag

<nummeric> begin_tag
field_to_create_1, field_to_create_n <idx> indextype_1 index_kind, indextype_n index_kind.
<n_len> length_of_nummer_in_byte
<n_begin_tag> begin_tag_of_nummer
<end> end_tag

<layout> layout_length_in_byte begin_tag
