Migrating Existing Archives (SAP Library - Content Management Service (BC-SRV-KPR))

Migrating Existing Archives

Note

This section is only relevant for partners who supported the ArchiveLink interface in the past and who now want to support the new SAP HTTP Content Server Interface.

When a component is stored, the MIME type is transferred by means of the field Content-Type in the request header (see RFCs 2045 and 2046). The content server then contains the MIME type, but does not evaluate it. The MIME type is used as the response Content-Type (for the get function, for example).

In older archives, only document classes such as ALF, FAX, and DOC were recognized. Therefore, a MIME type must be derived from these old document classes, so that previously stored documents can be accessed via the new interface. The MIME type is derived from the document class.

Document Structure

There are many documents in the former ArchiveLink interface that consist of several components. This is particularly true of documents in the document classes FAX, OTF and ALF. As well as one or more (FAX) data files, these documents sometimes also contain a description file (ALF) and a note file.

When existing archives are being migrated, a component ID (compId) must be assigned to each component. The procedure is as follows:

The compId data is assigned to the data file. If several data files exist (for document class FAX, for example, if there are several pages and each page is saved separately as a TIFF file), they are assigned to the components "data1", "data2", and so on. In this case there is no component "data".

A description file (ALF only) is assigned to the component "descr".

Finally, the note file is assigned to the component "note".

Deriving MIME Types from Document Classes

When an archive is migrated, the MIME type of the component "data" (or "data1", "data2", and so on) is derived from the document class.

Conversion rules are shown in the following table. The order of the entries is important. The first appropriate entry from the top is used for conversion.

Document Class	MIME Type
FAX	image/tiff
BIN	application/octet-stream
DOC	application/msword
PDF	application/pdf
PS	application/postscript
RTF	application/rtf
XLS	application/vnd.ms-excel
MPP	application/vnd.ms-project
PPT	application/vnd.ms-powerpoint
ALF	application/x-alf
OTF	application/x-otf
RAW	application/x-raw
REO	application/octet-stream
SCR	application/x-scr
BMP	image/bmp
GIF	image/gif
JPG	image/jpeg
PCX	image/pcx
TIFF	image/tiff
TIF	image/tiff
HTM	text/html
TXT	text/plain

Note

No MIME type is set for document classes not listed here.

The components "descr" (ALF only) and "note" contain the MIME-Type as follows:

compId	MIME Type
note	application/x-note
descr	application/x-alf-descr