Add Roadmap section

Signed-off-by: Juan Cruz Viotti <jv@jviotti.com>

Author: jviotti

README.markdown

@@ -5,3 +5,267 @@ A growing collection of hand-crafted high-quality schemas by Sourcemeta.
 
 > [!CAUTION]
 > This repository is a work-in-progress and not ready for general use yet.
+
+Roadmap
+-------
+
+This section tracks standards and specifications that should ideally be covered in this library. Checkmarks (✓) indicate completed schemas.
+
+### IETF RFCs (Internet Engineering Task Force)
+
+#### HTTP (Hypertext Transfer Protocol)
+- ✓ [RFC 9110](https://www.rfc-editor.org/rfc/rfc9110) - HTTP Semantics
+  - ✓ Status codes (all classes, standard enum)
+  - ✓ Methods (generic pattern, standard enum)
+  - ✓ ETags (strong, weak, combined)
+  - ✓ HTTP/HTTPS URLs
+  - [ ] Header field names
+  - [ ] Header field values
+  - [ ] Content-Type values
+  - [ ] Cache-Control directives
+  - [ ] Accept header values
+  - [ ] Content-Encoding values
+  - [ ] Transfer-Encoding values
+- [RFC 5789](https://www.rfc-editor.org/rfc/rfc5789) - PATCH Method (✓ included in method-standard)
+- [RFC 4918](https://www.rfc-editor.org/rfc/rfc4918) - WebDAV (✓ methods included in method-standard)
+- [RFC 6265](https://www.rfc-editor.org/rfc/rfc6265) - HTTP State Management (Cookies)
+  - [ ] Cookie names
+  - [ ] Cookie values
+  - [ ] Set-Cookie directives
+- [RFC 7230-7235](https://www.rfc-editor.org/rfc/rfc7230) - HTTP/1.1 Message Syntax and Routing
+  - [ ] Request-Line
+  - [ ] Status-Line
+- [RFC 7540](https://www.rfc-editor.org/rfc/rfc7540) - HTTP/2
+- [RFC 9113](https://www.rfc-editor.org/rfc/rfc9113) - HTTP/2 (updated)
+
+#### URI/URL (Uniform Resource Identifiers)
+- ✓ [RFC 3986](https://www.rfc-editor.org/rfc/rfc3986) - URI Generic Syntax
+  - ✓ URI (generic)
+  - ✓ URL
+  - ✓ URN
+  - ✓ URI references
+  - ✓ Relative references
+  - [ ] URI schemes (specific: ftp, file, ws, wss, etc.)
+  - [ ] Authority component
+  - [ ] Path segments
+  - [ ] Query strings
+  - [ ] Fragments
+
+#### Email
+- ✓ [RFC 5322](https://www.rfc-editor.org/rfc/rfc5322) - Internet Message Format
+  - ✓ Email addresses
+  - [ ] Email headers
+  - [ ] Message-ID
+- [RFC 6854](https://www.rfc-editor.org/rfc/rfc6854) - Group syntax in From and Sender headers
+- [RFC 2045-2049](https://www.rfc-editor.org/rfc/rfc2045) - MIME
+  - [ ] MIME types
+  - [ ] Content-Type headers
+  - [ ] Content-Disposition
+  - [ ] Multipart boundaries
+
+#### JSON Related
+- ✓ [RFC 6901](https://www.rfc-editor.org/rfc/rfc6901) - JSON Pointer
+- [RFC 6902](https://www.rfc-editor.org/rfc/rfc6902) - JSON Patch
+  - [ ] JSON Patch operations
+  - [ ] JSON Patch documents
+- [RFC 7396](https://www.rfc-editor.org/rfc/rfc7396) - JSON Merge Patch
+- ✓ [RFC 9457](https://www.rfc-editor.org/rfc/rfc9457) - Problem Details for HTTP APIs
+- [RFC 8259](https://www.rfc-editor.org/rfc/rfc8259) - JSON Data Interchange Format
+  - [ ] JSON values (with strict validation)
+
+#### Date and Time
+- [RFC 3339](https://www.rfc-editor.org/rfc/rfc3339) - Date and Time on the Internet
+  - [ ] date-time format
+  - [ ] date format
+  - [ ] time format
+  - [ ] duration format
+- [RFC 2822](https://www.rfc-editor.org/rfc/rfc2822) - Internet Message Format (date-time)
+
+#### Authentication and Security
+- [RFC 7519](https://www.rfc-editor.org/rfc/rfc7519) - JSON Web Token (JWT)
+  - [ ] JWT structure
+  - [ ] JWT claims (standard and custom)
+- [RFC 7515](https://www.rfc-editor.org/rfc/rfc7515) - JSON Web Signature (JWS)
+- [RFC 7516](https://www.rfc-editor.org/rfc/rfc7516) - JSON Web Encryption (JWE)
+- [RFC 7517](https://www.rfc-editor.org/rfc/rfc7517) - JSON Web Key (JWK)
+- [RFC 6749](https://www.rfc-editor.org/rfc/rfc6749) - OAuth 2.0
+  - [ ] Authorization requests
+  - [ ] Token responses
+- [RFC 8414](https://www.rfc-editor.org/rfc/rfc8414) - OAuth 2.0 Authorization Server Metadata
+
+#### Identifiers
+- [RFC 4122](https://www.rfc-editor.org/rfc/rfc4122) - UUID
+  - [ ] UUID v1 (time-based)
+  - [ ] UUID v4 (random)
+  - [ ] UUID v5 (name-based SHA-1)
+  - [ ] UUID generic format
+- [RFC 9562](https://www.rfc-editor.org/rfc/rfc9562) - UUID (updated)
+  - [ ] UUID v6 (time-ordered)
+  - [ ] UUID v7 (Unix Epoch time-based)
+  - [ ] UUID v8 (custom)
+
+#### Network and IP
+- [RFC 791](https://www.rfc-editor.org/rfc/rfc791) - Internet Protocol (IPv4)
+  - [ ] IPv4 addresses
+  - [ ] IPv4 CIDR notation
+- [RFC 4291](https://www.rfc-editor.org/rfc/rfc4291) - IPv6 Addressing Architecture
+  - [ ] IPv6 addresses (full, compressed)
+  - [ ] IPv6 CIDR notation
+- [RFC 1034](https://www.rfc-editor.org/rfc/rfc1034) - Domain Names
+  - [ ] Domain names (DNS)
+  - [ ] Hostnames
+  - [ ] Fully qualified domain names (FQDN)
+- [RFC 952](https://www.rfc-editor.org/rfc/rfc952) - Hostname specification
+- [RFC 5952](https://www.rfc-editor.org/rfc/rfc5952) - IPv6 Address Text Representation
+
+#### Language and Locale
+- [RFC 5646](https://www.rfc-editor.org/rfc/rfc5646) / [BCP 47](https://www.rfc-editor.org/info/bcp47) - Language Tags
+  - [ ] Language tags (e.g., en-US, zh-Hans)
+  - [ ] Language subtags
+  - [ ] Script subtags
+  - [ ] Region subtags
+
+#### Media Types
+- [RFC 6838](https://www.rfc-editor.org/rfc/rfc6838) - Media Type Specifications
+  - [ ] Media types (MIME types)
+  - [ ] Type/subtype structure
+  - [ ] Parameters
+
+#### Other IETF Standards
+- [RFC 1321](https://www.rfc-editor.org/rfc/rfc1321) - MD5 Message-Digest Algorithm
+  - [ ] MD5 hash format
+- [RFC 3174](https://www.rfc-editor.org/rfc/rfc3174) - SHA-1
+  - [ ] SHA-1 hash format
+- [RFC 6234](https://www.rfc-editor.org/rfc/rfc6234) - SHA-2 family
+  - [ ] SHA-256 hash format
+  - [ ] SHA-512 hash format
+- [RFC 4648](https://www.rfc-editor.org/rfc/rfc4648) - Base16, Base32, Base64 Encodings
+  - [ ] Base64 encoded strings
+  - [ ] Base64URL encoded strings
+  - [ ] Base32 encoded strings
+
+### ISO Standards (International Organization for Standardization)
+
+#### Date, Time, and Duration
+- [ISO 8601-1:2019](https://www.iso.org/standard/70907.html) - Date and time representations
+  - [ ] Date formats (YYYY-MM-DD, etc.)
+  - [ ] Time formats (HH:MM:SS, etc.)
+  - [ ] DateTime with timezone
+  - [ ] Week dates
+  - [ ] Ordinal dates
+  - [ ] Duration (P notation)
+  - [ ] Time intervals
+  - [ ] Recurring time intervals
+
+#### Language and Country Codes
+- [ISO 639-1:2002](https://www.iso.org/standard/22109.html) - Language codes (2-letter)
+  - [ ] Two-letter language codes (en, es, fr, etc.)
+- [ISO 639-2:1998](https://www.iso.org/standard/4767.html) - Language codes (3-letter)
+  - [ ] Three-letter language codes
+- [ISO 3166-1](https://www.iso.org/iso-3166-country-codes.html) - Country codes
+  - [ ] Alpha-2 codes (US, GB, JP, etc.)
+  - [ ] Alpha-3 codes (USA, GBR, JPN, etc.)
+  - [ ] Numeric codes
+- [ISO 3166-2](https://www.iso.org/standard/72483.html) - Subdivision codes
+  - [ ] Country subdivision codes (US-CA, GB-ENG, etc.)
+
+#### Currency and Units
+- [ISO 4217](https://www.iso.org/iso-4217-currency-codes.html) - Currency codes
+  - [ ] Currency codes (USD, EUR, GBP, etc.)
+  - [ ] Currency numbers
+- ✓ [ISO 80000-1:2022](https://www.iso.org/standard/76921.html) - Quantities and units
+  - ✓ Percentage (0-100)
+  - [ ] Other units
+
+#### Information Technology
+- ✓ [ISO/IEC 2382:2015](https://www.iso.org/standard/63598.html) - Information technology vocabulary
+  - ✓ Byte (non-negative integer)
+  - [ ] Bit
+  - [ ] Kilobyte, Megabyte, Gigabyte, etc.
+
+### IEEE Standards (Institute of Electrical and Electronics Engineers)
+
+#### POSIX (Portable Operating System Interface)
+- ✓ [IEEE 1003.1 (POSIX.1-2017)](https://pubs.opengroup.org/onlinepubs/9699919799/) - POSIX.1
+  - ✓ Absolute paths
+  - ✓ Relative paths
+  - ✓ Generic paths
+  - [ ] File permissions (octal notation)
+  - [ ] Process IDs
+  - [ ] User IDs / Group IDs
+  - [ ] File descriptors
+  - [ ] Environment variable names
+  - [ ] Shell command syntax
+
+#### Floating Point
+- [IEEE 754](https://standards.ieee.org/standard/754-2019.html) - Floating-Point Arithmetic
+  - [ ] Special values (NaN, Infinity, -Infinity)
+  - [ ] Subnormal numbers
+
+### IANA Registries (Internet Assigned Numbers Authority)
+
+- [Media Types](https://www.iana.org/assignments/media-types/)
+  - [ ] Registered media types
+- [Character Sets](https://www.iana.org/assignments/character-sets/)
+  - [ ] Character set names
+- [Time Zone Database](https://www.iana.org/time-zones)
+  - [ ] IANA time zone identifiers (America/New_York, etc.)
+- [Port Numbers](https://www.iana.org/assignments/service-names-port-numbers/)
+  - [ ] Well-known ports (0-1023)
+  - [ ] Registered ports (1024-49151)
+  - [ ] Valid port range (0-65535)
+- [HTTP Status Codes](https://www.iana.org/assignments/http-status-codes/)
+  - [ ] Extended status codes beyond RFC 9110
+
+### Software Licensing
+
+- [SPDX](https://spdx.org/licenses/) - Software Package Data Exchange
+  - [ ] SPDX license identifiers (MIT, Apache-2.0, GPL-3.0, etc.)
+  - [ ] SPDX license expressions (MIT OR Apache-2.0)
+
+### Versioning
+
+- [Semantic Versioning 2.0.0](https://semver.org/)
+  - [ ] Semantic version strings (MAJOR.MINOR.PATCH)
+  - [ ] Pre-release versions
+  - [ ] Build metadata
+  - [ ] Version ranges
+
+### Cryptography
+
+- [Bitcoin](https://bitcoin.org/bitcoin.pdf)
+  - [ ] Bitcoin addresses
+  - [ ] Bitcoin transaction hashes
+- [Ethereum](https://ethereum.org/)
+  - [ ] Ethereum addresses
+  - [ ] Ethereum transaction hashes
+
+### Geographic and Geospatial
+
+- [WGS 84](https://en.wikipedia.org/wiki/World_Geodetic_System) - World Geodetic System
+  - [ ] Latitude (-90 to 90)
+  - [ ] Longitude (-180 to 180)
+  - [ ] Altitude
+
+### Telecommunications
+
+- [E.164](https://www.itu.int/rec/T-REC-E.164/) - International telephone numbers
+  - [ ] Phone numbers (international format)
+- [ISSN](https://www.issn.org/) - International Standard Serial Number
+  - [ ] ISSN format
+- [ISBN](https://www.isbn-international.org/) - International Standard Book Number
+  - [ ] ISBN-10
+  - [ ] ISBN-13
+
+### Miscellaneous
+
+- [Cron Expressions](https://en.wikipedia.org/wiki/Cron)
+  - [ ] Cron schedule format
+- Credit Cards
+  - [ ] Credit card numbers (Luhn algorithm)
+  - [ ] CVV codes
+  - [ ] Expiration dates
+- [MAC Addresses](https://standards.ieee.org/products-programs/regauth/)
+  - [ ] MAC address formats (colon, hyphen, dot notation)
+- [VIN](https://www.iso.org/standard/52200.html) - Vehicle Identification Number
+  - [ ] VIN format (17 characters)