myConnection.doProppatch(null, path, request, null);
myConnection.doProppatch(null, path, request, null, null);
    public void setRevisionPropertyValue(long revision, String propertyName, String propertyValue) throws SVNException {        assertValidRevision(revision);        StringBuffer request = DAVProppatchHandler.generatePropertyRequest(null, propertyName, propertyValue);        try {            openConnection();            // get baseline url and proppatch.            DAVBaselineInfo info = DAVUtil.getBaselineInfo(myConnection, this, SVNEncodingUtil.uriEncode(getLocation().getPath()), revision, false, false, null);            String path = SVNPathUtil.append(info.baselineBase, info.baselinePath);            path = info.baseline;            try {                myConnection.doProppatch(null, path, request, null);            } catch (SVNException e) {                SVNErrorMessage err = SVNErrorMessage.create(SVNErrorCode.RA_DAV_REQUEST_FAILED, "DAV request failed; it's possible that the repository's " +                        "pre-rev-propchange hook either failed or is non-existent");                SVNErrorManager.error(err, e.getErrorMessage());                            }        } finally {            closeConnection();        }    }