PDFlib TET PDF IFilter 4.0 Manual

3.10 Metadata in Indexing Service
Create a column definition file. In order to use custom metadata properties with Indexing
Service you must prepare a column definition file (often called msscolmn.txt)
which specifies the names, data types, and GUIDs of properties. The property entries
must match the corresponding property descriptions in the XML configuration file. Column
definitions must be specified according to the following syntax:
"FriendlyName" (Type) = PropertySetGuid PropertySpec
Each line contains all or a subset of the following components:
> FriendlyName (must be enclosed with double quotation marks): alias name for the
property (must not contain whitespace): should match the name attribute of the
Property element in the XML configuration file (or the name of one of the predefined
properties listed in Appendix A, »Predefined Metadata Properties«)
> Type (optional; must be enclosed with parentheses): must match the type attribute of
the Property element in the XML configuration file, using the type designations
shown in Table 3.9. If this entry is missing, the default type DBTYPE_WSTR | DBTYPE_
BYREF (i.e. String) will be used.
> PropertySetGuid: must match the guid attribute of the PropertySet element in the XML
configuration file.
> PropertySpec: must match the friendlyname attribute or the identifier attribute of the
Property element in the XML configuration file. The friendlyname can only be used if
the identifier attribute is missing or if the useIdentifier attribute of the Filtering element
is false. The identifier can be specified in decimal or hexadecimal (starting with
0x) notation.
Empty lines and lines beginning with a number sign »#« will be ignored and can be
used for comments. The following example demonstrates a few property descriptions
(the first line with the [Names] entry is important):
[Names]
"fontcount" (DBTYPE_I4) = 5eac0060-1ba4-11dd-92c4-0002a5d5c51b 2
"weblink" (DBTYPE_WSTR | DBTYPE_BYREF) = 5eac0060-1ba4-11dd-92c4-0002a5d5c51b 6
Table 3.9 Property data types for Indexing Service
data type in TET PDF IFilter
data type in property descriptions in
mscolmn.txt
data type for Indexing Service
(interactive editing of properties)
Int32 DBTYPE_I4 VT_I4
Double DBTYPE_R8 VT_R8
Boolean DBTYPE_BOOL VT_BOOL
DateTime DBTYPE_DATE VT_DATE
String
DBTYPE_WSTR | DBTYPE_BYREF
for properties with vector treatment:
DBTYPE_WSTR | DBTYPE_VECTOR
VT_LPWSTR
Note Column definition files do not seem to work with 64-bit versions of Indexing Service.
3.10 Metadata in Indexing Service 59