myConnection.doProppatch(null, blProps.getURL(), request, null);
myConnection.doProppatch(null, path, request, null);
    public void setRevisionPropertyValue(long revision, String propertyName, String propertyValue) throws SVNException {        assertValidRevision(revision);        StringBuffer request = DAVProppatchHandler.generatePropertyRequest(null, propertyName, propertyValue);        try {            openConnection();            // 1. get vcc for root.            DAVBaselineInfo info = DAVUtil.getBaselineInfo(myConnection, this, SVNEncodingUtil.uriEncode(getLocation().getPath()), revision, false, false, null);            String path = SVNPathUtil.append(info.baselineBase, info.baselinePath);            path = DAVUtil.getVCCPath(myConnection, this, path);                        // 2. get href from specific vcc with using "label"            DAVProperties blProps = DAVUtil.getBaselineProperties(myConnection, this, path, revision, new DAVElement[] {DAVElement.AUTO_VERSION});            try {                myConnection.doProppatch(null, blProps.getURL(), 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();        }    }