Sticking my neck out slightly, but I believe this is the sense. In other words, I believe that silk brocade (brocart de soie) is a form of soie façonnée, but not all soie façonnée is brocade (which means that the pattern is woven into the fabric as a supplementary weft, designed to look embroidered), although I think it once was. Soie façonnée can be and nowadays often is printed; the point is that it has some kind of pattern or adornment. The basic sense of "façonner" is probably adorn or beautify.

This is about the early nineteenth century, when I think soie façonnée did mean silk brocade:

"In fact, of course, the popularity of brocade had receded through no fault of the women weavers, and they were able to gain employment in their specialty of plain, undecorated fabric. These less costly fabrics continued to find mass markets, signaling a "democratization" of silk products. In 1810, of the 11,699 working looms, plain silk (étoffes unies) accounted for 9,079 while brocades (étoffe façonnée) were made by only 1,354. The same trend applied to velvet with 538 looms making plain velvet (velours unis) and only 161 making patterned velvet (velours façonné)."
https://books.google.es/books?id=JXO7yR1U1Z0C&pg=PA277&lpg=P...

The reference to velours façonné at the end here shows, I think, that although back then it did mean brocade in the case of silk, the word "façonner" essentially means imparting a pattern to the fabric, potentially by other means than brocade weaving.

Here's a Chanel "carré en soie façonnée imprimée". It's patterned, but printed, and I'm pretty sure it's not brocade.
http://catalogue.drouot.com/ref-drouot/lot-ventes-aux-encher...

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References and pictures do suggest that "soie façonnée" is quite a broad and generic term embracing a range of different specific fabrics. In this glossary, "étoffe de soie façonnée" is given as a definition of
brocade (brocart), brocatel (brocatelle), damask (damas), figured-stitched (broché) and shot (lancé).
http://femmeetmode.fr/cvmt/vocabulaireUS.htm

So it includes, but is not confined to, each of these things. It can be, and often is, but doesn't have to be, silk with a pattern or design woven into it. It really seems to me that it can refer to almost any kind of silk fabric that is not plain single-colour silk.

Faconne is jacquard woven satin

Lewandowski, Elizabeth J. (2011). The complete costume dictionary. Lanham, Md.: Scarecrow Press, Inc. p. 309. ISBN 9780810877856.
https://en.wikipedia.org/wiki/Satin#cite_note-lew-8



Home / Silk satin Jacquard - Ivory Floral

Silk satin Jacquard - Ivory Floral
This European silk satin has a self coloured jacquard floral pattern to it, shiny on one side and matter on the other. It would lend itself to shirts and blouses, dresses, or as a sumptuous lining, maybe in one of our lush faux furs.

John Lewis Melissa Floral Jacquard Duvet Cover and Pillowcase Set, Blue
http://www.johnlewis.com/john-lewis-melissa-floral-jacquard-...

http://www.topfabric.co.uk/silk-satin-jacquard-ivory-floral....

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http://www.ebay.co.uk/gds/Hermes-Jacquard-Silk-Scarves-/1000...

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Hermes scarves on jacquard silk are much valued by collectors and will always fetch a higher price than normal twill versions of the scarf. Some designs have been produced on several different jacquard designs, and all re-issues are now on normal twill silk. The jacquard is also a useful "watermark", virtually guaranteeing authenticity. It appears as a slightly raised, repeating pattern over which the scarf design is printed.

Below are some examples of the most commonly seen jacquards....
(from ebay link above)


The Art of Silk: How to Spot a Fake Hermes Scarf, and More ...
eluxemagazine.com/fashion/how-to-spot-a-fake-hermes-scarf/
9 Jul 2014 - One of the easiest way to spot authentic Hermes scarf is the incorporation of Jacquard silk (slightly 3D compared to the rest of the scarf).

Lot 399: HERMES Paris Carré en soie façonnée imprimée ...
www.invaluable.co.uk/.../hermes-paris-carre-en-soie-faconne...
Bid online, view images and see past prices for HERMES Paris Carré en soie façonnée . Invaluable is the world's largest marketplace of items at auction, live ...


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woven...