---
name: "bson_subtype_t"
section: "3"
platform: "linux"
package: "libbson-doc"
version: "1.30.4-1+deb13u3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/bson_subtype_t"
---

# bson\_subtype\_t(3)

Binary Field Subtype

## SYNOPSIS

```
#include <bson/bson.h>
typedef enum {
   BSON_SUBTYPE_BINARY = 0x00,
   BSON_SUBTYPE_FUNCTION = 0x01,
   BSON_SUBTYPE_BINARY_DEPRECATED = 0x02,
   BSON_SUBTYPE_UUID_DEPRECATED = 0x03,
   BSON_SUBTYPE_UUID = 0x04,
   BSON_SUBTYPE_MD5 = 0x05,
   BSON_SUBTYPE_COLUMN = 0x07,
   BSON_SUBTYPE_SENSITIVE = 0x08,
   BSON_SUBTYPE_USER = 0x80,
} bson_subtype_t;
```

## DESCRIPTION

This enumeration contains the various subtypes that may be used in a binary field. See *http://bsonspec.org* for more information.

## EXAMPLE

```
bson_t doc = BSON_INITIALIZER;
BSON_APPEND_BINARY (&doc, "binary", BSON_SUBTYPE_BINARY, data, data_len);
```

## AUTHOR

MongoDB, Inc

## COPYRIGHT

2009-present, MongoDB, Inc.