View source for CNMT

This is the metadata file that ends in <code>".cnmt{.nca}"</code> or <code>"meta0.ncd"</code>. This seems to replace the TMD format.

The official name for CNMT is "PackagedContentMeta".

= PackagedContentMetaHeader =
This is "nn::ncm::PackagedContentMetaHeader".

{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x8
| Id
|-
| 0x8
| 0x4
| Version
|-
| 0xC
| 0x1
| [[NCM_services#ContentMetaType|ContentMetaType]]
|-
| 0xD
| 0x1
| [17.0.0+] [[NCM_services#ContentMetaPlatform|ContentMetaPlatform]] ([1.0.0-16.1.0] Reserved)
|-
| 0xE
| 0x2
| ExtendedHeaderSize
|-
| 0x10
| 0x2
| ContentCount
|-
| 0x12
| 0x2
| ContentMetaCount
|-
| 0x14
| 0x1
| ContentMetaAttributes (0=None, 1=IncludesExFatDriver, 2=Rebootless, 4=Compacted)
|-
| 0x15
| 0x3
| Reserved
|-
| 0x18
| 0x4
| RequiredDownloadSystemVersion
|-
| 0x1C
| 0x4
| Reserved
|}

= SystemUpdateMetaExtendedHeader =
This is "nn::ncm::SystemUpdateMetaExtendedHeader".

{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x4
| ExtendedDataSize
|}

= ApplicationMetaExtendedHeader =
This is "nn::ncm::ApplicationMetaExtendedHeader".

{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x8
| PatchId
|-
| 0x8
| 0x4
| RequiredSystemVersion
|-
| 0xC
| 0x4
| RequiredApplicationVersion
|}

= PatchMetaExtendedHeader =
This is "nn::ncm::PatchMetaExtendedHeader".

{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x8
| ApplicationId
|-
| 0x8
| 0x4
| RequiredSystemVersion
|-
| 0xC
| 0x4
| ExtendedDataSize
|-
| 0x10
| 0x8
| Reserved
|}

= AddOnContentMetaExtendedHeader =
This is "nn::ncm::AddOnContentMetaExtendedHeader".

{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x8
| ApplicationId
|-
| 0x8
| 0x4
| RequiredApplicationVersion
|-
| 0xC
| 0x1
| [15.0.0+] ContentAccessibilities ([1.0.0-14.1.2] Reserved)
|-
| 0xD
| 0x3
| Reserved
|-
| 0x10
| 0x8
| [15.0.0+] DataPatchId
|}

= DeltaMetaExtendedHeader =
This is "nn::ncm::DeltaMetaExtendedHeader".

{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x8
| ApplicationId
|-
| 0x8
| 0x4
| ExtendedDataSize
|-
| 0xC
| 0x4
| Reserved
|}

= DataPatchMetaExtendedHeader =
This is "nn::ncm::DataPatchMetaExtendedHeader".

This was added with [15.0.0+]. 

{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x8
| DataId
|-
| 0x8
| 0x8
| ApplicationId
|-
| 0x10
| 0x4
| RequiredApplicationVersion
|-
| 0x14
| 0x4
| ExtendedDataSize
|-
| 0x18
| 0x8
| Reserved
|}

= PackagedContentInfo =
This is "nn::ncm::PackagedContentInfo".

{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x20
| Hash (SHA256 of the referenced content)
|-
| 0x20
| 0x10
| ContentId
|-
| 0x30
| [15.0.0+] 0x5 ([1.0.0-14.1.2] 0x6)
| Size
|-
| 0x35
| 0x1
| [15.0.0+] ContentAttributes
|-
| 0x36
| 0x1
| ContentType (0=Meta, 1=Program, 2=Data, 3=Control, 4=[[Internet_Browser|HtmlDocument]], 5=[[Internet_Browser|LegalInformation]], 6=[[NCA_Format|DeltaFragment]])
|-
| 0x37
| 0x1
| IdOffset
|}

= ContentMetaInfo =
This is "nn::ncm::ContentMetaInfo".

{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x8
| Id
|-
| 0x8
| 0x4
| Version
|-
| 0xC
| 0x1
| [[NCM_services#ContentMetaType|ContentMetaType]]
|-
| 0xD
| 0x1
| ContentMetaAttributes (0=None, 1=IncludesExFatDriver, 2=Rebootless, 4=Compacted)
|-
| 0xE
| 0x2
| Reserved
|}

This is used for SystemUpdate, see here: [[NCM_services#ReadEntryMetaRecords]].

= SystemUpdateMetaExtendedData =
This is "nn::ncm::SystemUpdateMetaExtendedData".

If the Version field is 1, the format is:
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x4
| Version
|-
| 0x4
| 0x4
| VariationCount
|-
| 0x8
| 0x20 * VariationCount
| [[#FirmwareVariationInfo|FirmwareVariationInfo]] (Version 1)
|}

If the Version field is 2, the format is:
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x4
| Version
|-
| 0x4
| 0x4
| VariationCount
|-
| 0x8
| 0x4 * VariationCount
| FirmwareVariationId
|-
| Variable
| 0x20 * VariationCount
| [[#FirmwareVariationInfo|FirmwareVariationInfo]] (Version 2)
|-
| Variable
| 0x10 * MetaCount (from [[#FirmwareVariationInfo|FirmwareVariationInfo]] (Version 2))
| [[#ContentMetaInfo|ContentMetaInfo]] (if ReferToBase is False)
|}

== FirmwareVariationInfo ==
This is "FirmwareVariationInfo ".

If the Version field is 1, the format is:
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x4
| FirmwareVariationId
|-
| 0x4
| 0x1C
| Reserved
|}

If the Version field is 2, the format is:
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x1
| ReferToBase (0=False, 1=True)
|-
| 0x1
| 0x3
| Reserved
|-
| 0x4
| 0x4
| MetaCount
|-
| 0x8
| 0x18
| Reserved
|}

= PatchMetaExtendedData =
This is "nn::ncm::PatchMetaExtendedData".

{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x4
| PatchHistoryHeaderCount
|-
| 0x4
| 0x4
| PatchDeltaHistoryCount
|-
| 0x8
| 0x4
| PatchDeltaHeaderCount
|-
| 0xC
| 0x4
| FragmentSetCount
|-
| 0x10
| 0x4
| PatchHistoryContentInfoCount
|-
| 0x14
| 0x4
| PatchDeltaPackagedContentInfoCount
|-
| 0x18
| 0x4
| Reserved
|-
| 0x1C
| 0x38 * PatchHistoryHeaderCount
| [[#PatchHistoryHeader|PatchHistoryHeader]]
|-
| Variable
| 0x28 * PatchDeltaHistoryCount
| [[#PatchDeltaHistory|PatchDeltaHistory]]
|-
| Variable
| 0x28 * PatchDeltaHeaderCount
| [[#PatchDeltaHeader|PatchDeltaHeader]]
|-
| Variable
| 0x34 * FragmentSetCount
| [[#FragmentSet|FragmentSet]]
|-
| Variable
| 0x18 * PatchHistoryContentInfoCount
| [[#PackagedContentInfo|PatchHistoryContentInfo]] ([[#PackagedContentInfo|PackagedContentInfo]] without the Hash entry)
|-
| Variable
| 0x38 * PatchDeltaPackagedContentInfoCount
| [[#PackagedContentInfo|PatchDeltaPackagedContentInfo]]
|-
| Variable
| 0x4 * FragmentIndicatorCount (from [[#FragmentSet|FragmentSet]])
| [[#FragmentIndicator|FragmentIndicator]]
|}

== PatchHistoryHeader ==
This is "nn::ncm::PatchHistoryHeader".

{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x10
| ContentMetaKey
|-
| 0x10
| 0x20
| Digest
|-
| 0x30
| 0x2
| ContentInfoCount
|-
| 0x32
| 0x6
| Reserved
|}

== PatchDeltaHistory ==
This is "nn::ncm::PatchDeltaHistory".

{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x8
| SourcePatchId
|-
| 0x8
| 0x8
| DestinationPatchId
|-
| 0x10
| 0x4
| SourceVersion
|-
| 0x14
| 0x4
| DestinationVersion
|-
| 0x18
| 0x8
| DownloadSize
|-
| 0x20
| 0x8
| Reserved
|}

== PatchDeltaHeader ==
This is "nn::ncm::PatchDeltaHeader".

{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x8
| SourcePatchId
|-
| 0x8
| 8
| DestinationPatchId
|-
| 0x10
| 0x4
| SourceVersion
|-
| 0x14
| 0x4
| DestinationVersion
|-
| 0x18
| 0x2
| FragmentSetCount
|-
| 0x1A
| 0x6
| Reserved
|-
| 0x20
| 0x2
| ContentInfoCount
|-
| 0x22
| 0x6
| Reserved
|}

== FragmentSet ==
This is "nn::ncm::FragmentSet".

{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x10
| SourceContentId
|-
| 0x10
| 0x10
| DestinationContentId
|-
| 0x20
| 0x6
| SourceSize
|-
| 0x26
| 0x6
| DestinationSize
|-
| 0x2C
| 0x2
| FragmentIndicatorCount
|-
| 0x2E
| 0x1
| FragmentTargetContentType (0=Meta, 1=Program, 2=Data, 3=Control, 4=[[Internet_Browser|HtmlDocument]], 5=[[Internet_Browser|LegalInformation]], 6=[[NCA_Format|DeltaFragment]])
|-
| 0x2F
| 0x1
| UpdateType (0=ApplyAsDelta, 1=Overwrite, 2=Create)
|-
| 0x30
| 0x4
| Reserved
|}

== FragmentIndicator ==
This is "nn::ncm::FragmentIndicator".

{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x2
| ContentInfoIndex
|-
| 0x2
| 0x2
| FragmentIndex
|}

= DeltaMetaExtendedData =
This is "nn::ncm::DeltaMetaExtendedData".

{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x8
| SourcePatchId
|-
| 0x8
| 0x8
| DestinationPatchId
|-
| 0x10
| 0x4
| SourceVersion
|-
| 0x14
| 0x4
| DestinationVersion
|-
| 0x18
| 0x2
| FragmentSetCount
|-
| 0x1A
| 0x6
| Reserved
|-
| 0x20
| 0x34 * FragmentSetCount
| [[#FragmentSet|FragmentSet]]
|-
| Variable
| 0x4 * FragmentIndicatorCount (from [[#FragmentSet|FragmentSet]])
| [[#FragmentIndicator|FragmentIndicator]]
|}

= Digest =
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x20
| Digest
|}

This is a SHA-256 hash always found at the end of the file. The hash is calculated over the CNMT file's contents, but this is only done for the development version of the file which results in its production version counterpart sharing the same hash value.