Update language

openid-4-verifiable-credential-issuance-1_0.md

@@ -1194,7 +1194,7 @@ This specification defines the following Credential Issuer Metadata:
   * `cryptographic_binding_methods_supported`: OPTIONAL. Array of case sensitive strings that identify how the Credential is bound to the identifier of the End-User who possesses the Credential as defined in (#credential-binding). Support for keys in JWK format [@!RFC7517] is indicated by the value `jwk`. Support for keys expressed as a COSE Key object [@!RFC8152] (for example, used in [@!ISO.18013-5]) is indicated by the value `cose_key`. When Cryptographic Binding Method is a DID, valid values MUST be a `did:` prefix followed by a method-name using a syntax as defined in Section 3.1 of [@!DID-Core], but without a `:`and method-specific-id. For example, support for the DID method with a method-name "example" would be represented by `did:example`. Support for all DID methods listed in Section 13 of [@DID_Specification_Registries] is indicated by sending a DID without any method-name.
   * `cryptographic_suites_supported`: OPTIONAL. Array of case sensitive strings that identify the cryptographic suites that are supported for the `cryptographic_binding_methods_supported`. Cryptographic algorithms for Credentials in `jwt_vc` format should use algorithm names defined in [IANA JOSE Algorithms Registry](https://www.iana.org/assignments/jose/jose.xhtml#web-signature-encryption-algorithms). Cryptographic algorithms for Credentials in `ldp_vc` format should use signature suites names defined in [Linked Data Cryptographic Suite Registry](https://w3c-ccg.github.io/ld-cryptosuite-registry/).
   * `proof_types_supported`: OPTIONAL. A JSON array of case sensitive strings, each representing `proof_type` that the Credential Issuer supports. Supported values include those defined in (#proof_types) or other values defined in a profile of this specification or elsewhere. If omitted, the default value is `jwt`. `proof_type` claim is defined in (#credential_request).
-  * `proof_of_possession_required`: OPTIONAL. A boolean that indicates whether a proof of possession must be submitted when requesting a credential of this format. If this field is omitted it can assumed to be `false`.
+  * `proof_of_possession_required`: OPTIONAL. Boolean value specifying whether Credential Issuer requires a proof of possession to be submitted in the Credential Request, with `true` indicating support. If this field is omitted it can assumed to be `false`.
   * `display`: OPTIONAL. An array of objects, where each object contains the display properties of the supported credential for a certain language. Below is a non-exhaustive list of parameters that MAY be included.
       * `name`: REQUIRED. String value of a display name for the Credential.
       * `locale`: OPTIONAL. String value that identifies the language of this object represented as a language tag taken from values defined in BCP47 [@!RFC5646]. Multiple `display` objects MAY be included for separate languages. There MUST be only one object for each language identifier.