Creating Databases – Importing a Delimited ASCII Text ... - LexisNexis

Creating Databases – Importing a Delimited ASCII Text (DAT) File 6
Field Attributes
Attribute* Use Notes
Key
Image
Most commonly applied to fixed length
fields, however it may be applied to any field
(including paragraph fields) to make
relational searches faster.
Used to link Concordance with an Image
viewer, it indicates which field contains the
image name or alias.
Keying a field creates a .KEY file, as KEY
files grow in size, their efficiency decreases
and may slow relational searches.
All keyed fields will appear in the default
table view.
Select only one field per database as an
Image field.
Identifying multiple fields in a database as
an image field will interfere with the linkage
between Concordance and the viewer.
Indexed Enables full text searching. Places every word in the field into a
dictionary file (.NDX and .DCT) for fast
retrieval.
System
Accession
Optical Character
Recognition (OCR) Indexing
Table 2: Field Attributes
Special field that is hidden with no read or
write access to end-users.
Unique serial numbers internally assigned
to each record, managed entirely by
Concordance.
Will not index text that is not contained in a
defined dictionary.
System fields should never be indexed,
added, deleted or modified by users.
Concordance will create these fields for
replication and synchronization information.
Accession numbers may not be edited or
modified. Helpful as load order identifier.
Note – As records are edited, exported or
removed you gaps in numbering may occur.
Not recommended for any fields. Causes
increased indexing times, and will limit the
indexing to Webster’s dictionary and will
include only English words.
Use Synonyms instead.
*Not every Attribute is available for every field type
4 Repeat steps 1 through 3 as necessary to create a structure to match your DAT file.
5 When you have completed creating all your fields, click OK.
Your database structure is ready for the data import.
Additional Considerations
Embedded Punctuation
Embedded punctuation is provided so that hyphenated words, dates, decimal numbers, and contractions
are not split into two or more words. You may add or delete punctuation as needed, by default
Concordance includes ‘ . , / characters as embedded punctuation for all fields.
If you will be importing OCR…
Create your OCR fields now, in addition to the fields for your DAT file import.
As a best practice, create at least two OCR fields labeled with ascending numbers (example: OCR1 &
OCR2) When using the ReadOCR.cpl to import your OCR text, the CPL will automatically overflow
text from the first OCR field if it is over 12 million characters into the next sequential named OCR field.
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