Can Texis handle BLOBs (binary large objects)?

Yes. Texis has a blob-type field useful for storing graphics or other binary data. But note that in Texis, textual content of any size usually is put in a variable-size varchar field. This provides superior text-indexing and searching functionality compared to storing text into blobs. But if you have binary content, Texis can manage the storage of files much more efficiently than an OS file system! That is because Texis keeps track of each record's location on disk, and can fetch it with a single disk seek-and-read operation; whereas operating systems are un-indexed, so that fetching files typically takes four or more seek-and-reads to search through the directory structure.