Oracle Wallet is container/repository to store credentials like certificates, certificate request and private keys, and used if you wish to enable HTTPS.
* Oracle Wallets can be stored either on file system or LDAP Server (like OID)
Managing Wallets: You manage Oracle Wallets using Oracle Wallet Manager (owm – java based application). OWM is executable in $ORACLE_HOME/bin .
Using owm you can
i) create wallets
ii) create certificate request
iii) import certificate to wallet
iv) Upload wallet to directory
SSL Wallet Directive for Web/Oracle-Apache Server
Directive SSLWallet used in ssl.conf (or httpd.conf) is used to define location of wallets which contains SSL Key and request file
Related Docs
Metalink Note 344434.1 How to Find and Use Oracle Wallet Manager Documentation with Oracle Application Server and SSL
Managing Wallets (Oracle DOC)
Question of day:How will you define Wallet location in httpd.conf if wallet is stored in OID instead of file system ?